Jaime Ramirez-Angulo

CURRICULUM VITAE

 

 

Jaime Ramírez-Angulo

 

Updated: March 10, 2016

 

Jaime Ramírez-Angulo is currently Klipsch Distinguished Professor, Distinguished Award Professor, IEEE Fellow, and Director of the Mixed-Signal VLSI Lab at the Klipsch School of Electrical and Computer Engineering, New Mexico State University ( Las Cruces, New Mexico), USA. He received a degree in Communications and Electronic Engineering (Professional degree), a M.S.E.E. from the National Polytechnic Institute in Mexico City and a Dr.-Ing degree form the University of Stuttgart in Stuttgart, Germany in 1975, 1977 and 1982 respectively. He was professor at the National Institute for Astrophysics Optics and Electronics (INAOE) and at Texas A&M University. His research is related to various aspects of design and test of analog and mixed-signal Very Large Scale Integrated Circuits. He has made numerous contributions to this field which have been reported in over five hundred publications in the most prestigious journals and conferences in analog circuit design. His papers have over 5000 citations. He has an H-index of 20 in ISI (Science Citation Index)  and 34  in Google scholar. He has two high technology patents and has held numerous invited and keynote presentations. He has been a consultant to Texas Instruments, NASA-ACE, NASA-Ames, NASA Goddard and Oak Ridge National Laboratories. His research has been supported by National Science Foundation, Sandia National Labs, Los Alamos National Labs, Engineering Foundation, Texas Instruments and Agilent. He received the prestigious URC University Research Council for exceptional achievements in creative scholarly activities and the Westhafer award for Excellence in Research and Creativity in March and May 2002 respectively. On October 2002 he was named Paul W. Klipsch Distinguished Professor and was IEEE distinguished lecturer for the period 2003-2005. He was named Distinguished Award Professor in August 2012. Two of his papers were listed in 2005 among the 100 most downloaded papers of all IEEE societies. In May 2004 one of his  students earned the award as most outstanding Ph.D.  student and  in 2006 and 2007 two of his students earned the award as most outstanding M.Sc. students at New Mexico State University. He was a Fulbright scholar for the period September 2009-May 2010 and was in the IEEE Circuits and Systems Fellow Selection Committee in 2009. In September 2014 he was awarded level III (highest level) membership in the mexican National Researcher System (Sistema Nacional de Investigadores or SNI).

 

 

  1. PERSONAL DATA AND HOW TO CONTACT ME
  2. DEGREES
  3. RESEARCH
  4. PROFESSIONAL EXPERIENCE AND COURSES TAUGHT
  5. HONORS AND AWARDS
  6. PUBLICATIONS
  7. Journal papers
  8. Book Chapters
  9. Conference papers

 

  1. FUNDING
  2. GRADUATE SUDENTS
  3. INVITED PRESENTATIONS
  4. MOST IMPORTANT RESEARCH CONTRIBUTIONS
  5. PROFESSIONAL ACTIVITIES
  6. PATENTS

 

1. PERSONAL DATA AND HOW TO CONTACT ME

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Distinguished Professor of Electrical and Computer Engineering Field of specialty: VLSI/Microelectronics

 

Director of VLSI laboratory at New Mexico State University

 

Address:          New Mexico State University

1125 Frenger Mall, Thomas Brown Building suite 106

Klipsch School of Electrical and Computer Engineering, Las Cruces, New Mexico 88003-0001

Tel. (575) 646‑4406, FAX (575) 646-1435, email:  jairamir@nmsu.edu  http: http://ece.nmsu.edu/faculty-staff/directory/name/jaime-ramirez-angulo/

 

2. DEGREES

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  • Ph.D. in Electrical Engineering University of Stuttgart, Stuttgart, Germany, 1982.

Thesis Design of Electronic Circuits: Low Computational Cost Algorithms for Production Yield Improvement (Field: Computer Aided. Design of Electronic Circuits) Ph.D. at University of Stuttgart from 1977-1982

 

  • MSEE. CINVESTAV-IPN (Center for Advanced Studies and Research, National Polytechnic Institute), Mexico City.  1977.

Thesis: Design of Acoustic Surface Wave Filters (Masters Degree at CINVESTAV-IPN from 1975-1977)

 

  • Communications and Electronics Engineer. (Professional Degree) National Polytechnic Institute of México (IPN), México City.  1975.

 

3. RESEARCH

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Microelectronics, Analog and Digital VLSI Circuit Design, Integrated Continuous-time and Switched-Capacitor Filters,  Current-mode techniques for Analog Signal  Processing, Neural and Fuzzy Networks, Device Modeling, Fault detection in analog and digital VLSI systems. BiCMOS circuit design, low-voltage low-power design techniques, RF microelectronic circuit design. High speed/High Slew rate Operational Amplifiers

 

4. PROFESSIONAL EXPERIENCE

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1982-1984       Researcher and Instructor at INAOE (Instituto Nacional de Astrofisica, Optica y Electronica), Tonantzintla, Puebla, Mexico. Field of work: Microelectronic Circuit Design

 

1985-1989       Assistant Professor at Texas A&M University, College Station, Texas. Field of work: Microelectronic Circuit Design

 

1990-Present   Associate Professor, Full Professor (since August 95), New Mexico State University. Field of work: Mixed-Signal and Analog Microelectronic Circuit Design

 

5b. Courses Taught

 

Electronic Devices and Circuits, Design of Circuits with Operational Amplifiers, Active Filters, Analog Microelectronics, Computer Aided Circuit Design, Digital VLSI System Design, Fuzzy Processors, CMOS RF Microelectronics, A/D and D/A conversion techniques, Introduction to Analog and Digital VLSI.

5. HONORS AND AWARDS

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  • IEEE Fellow for Contributions to Design Methodologies for Analog Signal Processing Integrated Circuits, January 1, 2000

 

  • CONACYT (Mexican National Science Council) Catedra Patrimonial de Excelencia  to carry out educational and research collaboration with the Tecnologico de Chihuahua 1995 and 1996

 

  • Member of Circuits and Systems IEEE Fellow Selection Committee 2008

 

  • New Mexico State University Award for Exceptional Achievements in Creative Scholarly Activity, March 19 2002

 

  • New Mexico State University Westhafer Award for Excellence in Research creative Activity, April 19, 2002 (Highest research award at New Mexico State University)

 

  • Paul and Valerie Klipsch Distinguished Professorship, October 11, 2002

 

  • Fulbright Scholar from September 2009 to April 2010

 

  • Distinguished Achievement  Professor, August 2012

 

  • IEEE distinguished lecturer for the period 2004-2005

 

  • Invited on a regular basis (two to three times a year) to deliver plenary presentations at professional conferences and workshops.

 

  • Over 500 publications in some of the most prestigious professional journals and conferences in analog and mixed-signal VLSI design

 

  • Two papers classified within the most cited papers in IEEE Circuits and Systems Society

 

  • Level III (highest level) membership in the mexican National Researcher System (Sistema Nacional de Investigadores or SNI).

 

 

6.  PUBLICATIONS

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6a. Journal papers

 

  1. “Fabrication of Thin Fim Hybrid microcircuits”, J. Ramírez‑Angulo A. Ortiz‑Gonzalez and J. Fragoso‑Lopez, Physics and Technology of Semiconductors (in spanish), vol.1, No. 3, pp. 270‑280, March 1983.

 

  1. “AROMA: An Area Optimized CAD Program for Cascade SC Filter Design”, Sánchez‑Sinencio and J. Ramírez‑Angulo, IEEE Trans. on Computer Aided Design, vol. CAD‑4, No.3, pp. 296‑302, July 1985.ISSN: 0278-0070

 

  1. “Component Quantization Effects on Continuous Time Filters”, J. Ramírez‑Angulo, R. L. Geiger and E. Sánchez‑Sinencio, IEEE Transactions on Circuits and Systems, vol. CAS‑33, No. 6, pp. 651‑659, June 1986. ISSN: 0098-4094

 

  1. “Characterization, Evaluation and Comparison of Laser-Trimmed Film Resistors,” J. Ramírez-Angulo, R. L. Geiger and E. Sánchez-Sinencio, IEEE Journal of Solid State Circuits, vol. SC-22, No. 6, pp. 1177-1189, December 1987. ISSN: 0018-9200

 

  1. “New Laser-Trimmed Film Resistor Structures for Very High Stability Requirements,” J. Ramírez-Angulo and R. L. Geiger, IEEE Transactions on Electron Devices, vol. ED-35, No. 4, pp. 516-518, April 1988.ISSN: 0018-9383

 

  1. “Design of Active Filters for Large Variations in the Gain-Bandwidth Product,” J. Ramírez-Angulo, Proceedings of the IEEE, vol. 76, No. 10, pp. 1368-1370, October 1988.ISSN: 0018-9219

 

  1. “FIESTA: A Filter Educational Synthesis Teaching-Aid,” M. Kobe, J. Ramírez-Angulo, E. Sánchez-Sinencio, IEEE Transactions on Education, vol. 32, No. 3. 280-286, August 1989. ISSN: 0018-9359

 

  1. “OTA-Based Nonlinear Function Approximation,” E. Sánchez-Sinencio, J. Ramírez-Angulo and B. Linares Barranco, IEEE Journal of Solid Sate Circuits, vol. 24, No. 6, pp. 1576-1586, December 1989.

 

  1. “Active Compensation of Operational Transconductance Amplifier Filters Using Partial Positive Feedback,” J. Ramírez-Angulo and E. Sánchez-Sinencio, IEEE Journal of Solid State Circuits, vol. SC-25, No. 4, pp. 1024-1028, August 1990. ISSN: 0018-9200

 

  1. ”Extended Transconductance Adjustment/linearisation Technique”, W. J. Adams and J. Ramírez-Angulo, Electronics Letters, vol. 27, No. 10, pp. 842-844, May 1991. ISSN: 0013-5194

 

 

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  1. “Applications of Composite BICMOS Transistors,” J. Ramírez-Angulo, M. Deyong and W.J. Adams, Electronics Letters, 27, No. 24, pp. 2236-2238, Nov. 1991. ISSN: 0013-5194

 

  1. “A High Frequency Low Voltage CMOS diode”, J. Ramírez-Angulo, Electronics Letters, Vol. 28, No. 3, pp. 299-301, January 1992. ISSN: 0013-5194 (124)

 

  1. “Current Mode Continuous-Time Filters: Two Design Approaches”, J. Ramírez-Angulo, E. Sánchez-Sinencio and M. Robinson, IEEE Transactions on Circuits and Systems, vol. 39, No. 6, June 1992, pp. 337-341. ISSN: 0098-4094 (125)

 

  1. “Programmable BiCMOS Transconductor for C-TA filters”, J. Ramírez-Angulo and E. Sánchez-Sinencio, Electronics Letters, vol. 28, No. 13, June 4th 1992, pp. 1185-1187. ISSN: 0013-5194 (126)

 

  1. ” A low-voltage vertical BiCMOS OTA”, J. Ramírez-Angulo, IEE proceedings Part G, Vol. 139, No. 4, August 1992, pp. 553-556, ISSN. 0143-7089 (127)

 

  1. “Highly Linear Four Quadrant BiCMOS Analogue Multiplier”, Jaime Ramírez-Angulo, Electronics Letters, vol. 28, No. 19, September 10th 1992, pp. 1783-178. ISSN: 0013-5194 (128)

 

  1. “A BICMOS Current Buffer Rectifier,” J. Ramírez-Angulo, IEEE Transactions on Circuits and Systems, vol. 39, No. 10, Oct. 92, pp. 849-851. ISSN: 0098-4094 (129)

 

  1. “A Compact Current controlled CMOS Waveform Generator,” J. Ramírez-Angulo, IEEE Transactions on Circuits and Systems, vol. 39, No. 12 December 1992, pp. 883-885 ISSN: 0098-4094

 

  1. “Digitally Tunable MOS Current Mirrors for High Precision Applications”, J. Ramírez-Angulo, IEE Proceedings Part G, vol. 140, No. 2, April 1993.pp. 145-147, ISSN. 0956-3768 (121)

 

  1. “OTA-C Biquad Filter Silicon Compiler”, M.R.Kobe, E. Sánchez-Sinencio and J. Ramírez-Angulo, Analog Integrated Circuits and Signal Processing, pp. 83-98, vol. 3, No. 3, May 1993. ISSN: 0925-1030

 

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  1. “A Current mode Cellular Neural Network Implementation,” J. Varrientos, E. Sánchez-Sinencio and J. Ramírez-Angulo, IEEE Transactions on Circuits and Systems, 40, No 3, pp. 147-155, March 1993 ISSN: 0098-4094

 

  1. “BiCMOS Low Distortion Tunable Transconductor for Continuous-Time Filters”, M. Ali, M. Howe, E. Sánchez-Sinencio and J. Ramírez-Angulo, IEEE Transactions on Circuits and Systems, vol. 40, No.1, pp. 43-48, January 1993 (122)

 

  1. “iDD pulse response testing: A unified approach to testing analog and digital VLSI circuits,” J. Beasley, H. Ramamurthy, M. DeYong and J. Ramírez-Angulo, IEE Electronics Letters, vol. 29, No. 24, pp. 2101-2013, November 1993. ISSN: 0013-5194 (123)

 

  1. “Low-Voltage Building Blocks for Fuzzy Processors, J. Ramírez-Angulo, IEEE Circuits and Devices Magazine, vol. 10, No. 4, July 1994, pp. 48-50, ISSN: 8755-3996 (117)

 

  1. “Large foQ Second Order Filters Using Multiple Output OTAs”, Jaime Ramírez-Angulo and E. Sánchez-Sinencio, IEEE Transactions on Circuits and Systems, Vol. 41, No. 9, pp. 587-592, September 1994 ISSN: 0098-4094 (118)

 

  1. “High frequency compensated current-mode ladder filters using multiple output OTAs,” Jaime Ramírez-Angulo and E. Sánchez-Sinencio, IEEE Transactions on Circuits and Systems, Vol. 41, No. 9, pp. 581-586, Sept. 1994 ISSN: 0098-4094 (119)

 

  1. “Wide Range Gain Programmable class AB linear Current Mirrors for low supply operation,” , J. Ramirez-Angulo, IEEE Transactions on Circuits and Systems, Vol. 41, No. 9, pp. 631-634, September 1994 ISSN: 0098-4094 (120)

 

  1. “Low-Voltage OTA architectures Using Multiple Input Floating gate Transistors,” J. Ramírez-Angulo, S.C. Choi, G. Gonzalez-Altamirano, IEEE Transactions on Circuits and Systems, vol. 42, No. 12, pp.971-974, November 1995. ISSN: 0098-4094 (116)

 

  1. “OTA:GS filters: the new face of RC-active filters”, J. Ramírez-Angulo and G. Gonzalez Revista Mexicana de Fisica, vol. 42, No. 3 pp. 459-466, July 1996. ISSN 0035-001X (115)

 

  1. “Charge Mode Defuzzifiers using multiple input floating-gate transistors,” J, Ramírez-Angulo, V. Quintana, S.C. Choi, D. Zrilic and A. de Luca International Journal of Intelligent Automation and Soft Control, Special Issue on Autonomous Control Engineering, vol. 3, No. 1, pp. 5-12, February 1997 ISSN. 1079-8587 (113)

 

  1. “Low-Voltage High-Frequency Continuous-time Filters Based on Simple Transconductors and Miller Integrators”, J. Ramírez-Angulo, Journal of Analog Integrated Circuits and Signal Processing, pp. 295-301, May 1997 ISSN: 0925-1030 (114)

 

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  1. “A simple technique for low-voltage op-amp operation in continuous-time,” J. Ramírez-Angulo, A Torralba, R.G. Carvajal and Tombs, IEE Electronics Letters, vol. 35, No. 4, February 18th, 1999, pp. 263-264  ISSN: 0013-5194 (110)

 

  1. ” A CMOS four quadrant Current/Transconductance multiplier,” A. Diaz-Sánchez, J. Ramírez-Angulo, E. Sánchez-Sinencio and Gunhee Han, Journal of Analog Integrated Circuits and Signal Processing, vol. 19, No. 2, May 1999, pp. 163-168. ISSN: 0925-1030 (112)

 

  1. “Very Low-Voltage Class AB CMOS and Bipolar Precision Current rectifiers,” J. Ramírez-Angulo, R.G. Carvajal, J. Tombs and A. Torralba, IEE Electronics Letters, Vol. 35. No. 22, October 1999, pp. 1904-1905. ISSN: 0013-5194 (111)

 

  1. “Hardware Implementations of Fuzzy Membership functions, Operations and Inference,” Djuro G. Zrilic, Jaime Ramírez-Angulo and B.Yuan Computers and Electrical Engineering, Vol. 26, No. 1, January 2000, pp. 85-105, ISSN: 0045-7906 (108)

 

  1. “Low-voltage CMOS amplifiers with wide input-output swing based on a novel scheme,” J. Ramírez-Angulo, A Torralba, R.G. Carvajal and J.Tombs, IEEE Transactions on Circuits and Systems-I, vol. 47, No. 5, May 2000, pp. 772-774. ISSN: 1549-8328 (109)

 

  1. High-speed high-precision min/max circuits in CMOS technology Carvajal, RG; Ramirez-Angulo, J; Martinez-Heredia, : Electronics Letters; April 13 2000; v.36, no.8, p.697-699 , ISSN: 0013-5194 (109)

 

  1. “Class AB output stage for low voltage CMOS op-amps with accurate quiescent current control,” A. Torralba, R.G. Carvajal, J. Martinez-Heredia and J. Ramirez-Angulo, Electronics Letters, vol. 36, No. 21, 12th October 2000, pp. 1753-1754. ISSN: 0013-5194 (107)

 

  1. “Floating-Gate based tunable CMOS low-voltage linear transconductor and its application to HF Gm-C filter design,” F. Munoz, A. Torralba, R. G. Carvajal, J. Tombs, and J. Ramirez Angulo, IEEE Transactions on Circuits and Systems II, special issue on applications of floating gate transistors, vol. 48, No. 1, January 2001, pp. 106-110, ISSN: 1549-7747 (104)

 

  1. “Low-voltage CMOS Op-amp with rail-to-rail signal swing for continuous-time signal processing using multiple-input floating-gate transistors,” J. Ramirez-Angulo, R. G. Carvajal, J. Tombs, and A. Torralba, IEEE Transactions on Circuits and Systems, special issue on applications of floating gate transistors, vol. 48, No. 1, Jan. 2001, pp. 110-116, ISSN: 1549-7747 (105)

 

  1. “MITE Circuits: The Continuous time counterpart to switched capacitor circuits,” Jaime Ramirez-Angulo and Antonio Lopez, IEEE Transactions on Circuits and Systems II, special issue on applications of floating gate transistors, vol. 48, No. 1, January 2001, pp. 45-55, ISSN: 1549-7747 (106)

 

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  1. “Compact low-power high slew sate CMOS buffer for large capacitive loads,” A.Torralba, R.G.Carvajal, J. Galán, and J.Ramírez-Angulo, Electronics Letters 38. No. 22, Oct. 24, 2002, pp. 1348-1349. ISSN: 0013-5194

 

  1. “Low-power Low-voltage differential class-AB OTA for SC circuits,” Carvajal, J. Galán, J.Ramírez-Angulo and A.Torralba, Electronics Letters, vol. 38, No. 22  pp. 1304-1305, Oct. 24, 2002. ISSN: 0013-5194 (101)

 

  1. “Simple technique using Local CMFB to enhance Slew Rate and bandwidth of one-Stage CMOS op-amps,” Jaime Ramirez-Angulo and Michael Holmes. Electronics Letters, vol. 38, No 23, pp. 1409-1411, November 7th 2002, ISSN: 0013-5194 (103)

 

  1. “Output stage for low supply voltage, high-performance CMOS mirrors,” A.Torralba, Carvajal, F. Muñoz and J.Ramírez-Angulo, Electronics Letters  38, No. 24, pp. 1528-1529, Nov. 21, 2002, ISSN: 0013-5194

 

  1. “Low Voltage Transconductor with High Linearity and large Bandwidth,” A.Torralba, J.M. Martinez-Heredia, R.G. Carvajal, and J.Ramírez-Angulo,, Electronics Letters  38, No. 25, pp. 1616-1617 December 5 2002, ISSN: 0013-5194 (100)

 

  1. “Innovative Built-In Self-Test Schemes for On-Chip Diagnosis, Compliant with the IEEE 1149.4 Mixed-Signal Test Bus Standard,” Gladys Omayra Ducoudray Acevedo and Jaime Ramírez-Angulo, Journal of Electronic Testing and Applications, vol. 19, issue 1, February 2003, pp. 21-28, ISSN: 0923-8174

 

  1. “An Analog Median Filter with Fuzzy Adaptation, “ J. Lemuz-Lopez, A, Diaz-Sanchez and J. Ramirez-Angulo, Microelectronics Reliablity; Feb. 2003; v.43, no.2, p.203-207, I SSN: 0026-2714

 

  1. “A New Analogue Switch for Very Low Voltage Applications, “ Muñoz, J. Ramírez-AnguloLopez-Martin R.G. Carvajal A. Torralba1 B. Palomo and M. Kachare, IEE Electronics Letters, May 2003; v.39, no.9, p.701-702. ISSN: 0013-5194

 

  1. “A new Family of Very Low-Voltage Analog Circuits Based on Quasi Floating Gate Transistors, J. Ramirez-Angulo, C. Urquidi, R.G. Carvajal, A. Lopez-Martin, IEEE Transactions on Circuits and Systems, II 50, No. 5 May 2003, pp. 214-220, ISSN: 1549-7747

 

  1. “Low-voltage high-gain differential OTA for SC circuits,” Carvajal, RG; Palomo, B; Torralba, A; Munoz, F; Ramirez-Angulo, Electronics Letters; Aug 7 2003; v.39, no.16, p.1159-1160, ISSN: 0013-5194

 

  1. “Class AB output stages for low voltage CMOS op-amps with accurate quiescent current control by means of dynamic biasing,” Torralba, R.G. Carvajal, J. Ramirez-Angulo, J. Tombs, F. Munoz, J.A. Galan , Journal of Analog Integrated Circuits and Signal Processing, Special Issue on ICECS  2001, Jul-Aug. 2003, Vol. 36, No. 1-2pp. 69-77. ISSN: 0925-1030

 

  1. “Analog Adaptive Median Filters” Alejandro Díaz-Sánchez , Jaime Ramírez-Angulo and Javier Lemus-Lopez, Journal of Analog Integrated Circuits and Signal Processing 36, No. 3 Sept. 2003, pp. 207-213, ISSN: 0925-1030

 

  1. “Low voltage class AB output stage for CMOS op-amps using multiple input floating gate Transistors, “ Carvajal, RG; Torralba, A; Tombs, J; Munoz, F; Ramirez-Angulo, J : Analog Integrated Circuits and Signal Processing; 2003; v.36, no.3, p.245-249. ISSN: 0925-1030

 

  1. “Very Low Voltage Rail-to-Rail Programmable-Gain CMOS Amplifier” Jaime Ramírez-Angulo , Antonio J. López-Martín , Ramón G. Carvajal , and Chad Lackey, Journal of Analog Integrated Circuits and Signal Processing Dec 2003; v.37, no.3, p.269-273, ISSN: 0925-1030

 

  1. ”Low-voltage analog circuits based on wideband capacitive coupling, “,J. Ramirez-Angulo, J; C. Urquidi, G. Carvajal, A. Torralba, ; A.J. Lopez-Martin, Journal of Analog Integrated Circuits and Signal Processing,  Dec 2003; v.37, no.3, p.253-257, ISSN: 0925-1030

 

  1. “Low-power low-voltage class-AB linear OTA for HF filters with a large tuning range.” J.A. Galan, R.G. Carvajal, F. Munoz, A. Torralba, Ramirez-Angulo, Journal of Analog Integrated Circuits and Signal Processing; Dec 2003; v.37, no.3, p.275-280, ISSN: 0925-1030

 

  1. “Low voltage CMOS analogue four quadrant multiplier based on flipped voltage followers,” J. Ramirez-Angulo, S. Thoutam, R.G. Carvajal and A. Lopez. Martin IEE Electronics Letters. Vol 39, No. 25, pp. 1771-1772, December 2003. ISSN: 0013-5194

 

  1. “Low-voltage Power-efficient Adaptive Biasing for CMOS Amplifiers and Buffers,” Baswa,  A.J. Lopez-Martin,  R.G. Carvajal, J. Ramirez-Angulo,  Electronics Letters; Feb. 19 2004; v.40, no.4, p.217-219. ISSN: 0013-5194

 

  1. “Low-voltage Micropower Super Class AB CMOS OTA “ S. Baswa, J. Lopez-Martin, J. Ramirez-Angulo,  R.G. Carvajal, Electronic Letters; Feb 19 2004; v.40, no.4, p.216-217. ISSN: 0013-5194

 

  1. “Low supply voltage high-performance CMOS current mirror with low input and output voltage requirements,” Ramirez-Angulo, J; Carvajal, RG; Torralba, A, IEEE Transactions on Circuits and Systems II-Express Briefs; March 2004; v.51, no.3, p.124-129, ISSN: 1549-7747

 

  1. “A Fully Parallel CMOS Analog Median Filter,” A. Diaz-Sanchez, J. Ramirez-Angulo, Lopez-Martin, E. Sanchez-Sinencio,  IEEE Transactions on Circuits and Systems II-Express Briefs; March 2004; v.51, no.3, p.116-123, ISSN: 1549-7747

 

  1. “Very Low-voltage Analog Signal Processing Based on Quasi-floating Gate Transistors,” ,J. Ramirez-Angulo, J. Lopez-Martin; R. G. Carvajal, F.M. Chavero, IEEE Journal of Solid State Circuits; March 2004; v.39, no.3, p.434-442. ISSN: 0925-1030

 

  1. “1.1V Low-Power Delta Sigma Modulator for 14-bit, 16KHz A/D Conversion Using a New Low-Voltage Class AB Op-Amp”, F. Munoz, A.P. Vega Leal, R.G. Carvajal, A. Torralba, J. Tombs and J. Ramirez-Angulo, Journal of Analog Integrated Circuits and Signal Processing, May 27, 2004

 

  1. “New compact CMOS continuous-time low-voltage analog rank-order filter architecture ,“ Ramirez-Angulo, R. Gonzalez-Carvajal, G.O. Ducoudray, A.J.  Lopez-Martin,  A. Torralba,   IEEE Transactions on Circuits and Systems II-Express Briefs; May 2004; v.51, no.5, p.257-261, ISSN: 1549-7747

 

  1. “Very low voltage MOS translinear loops based on flipped voltage followers ,” Lopez-Martin, AJ; Carlosena, A; Ramirez-Angulo, Journal of Analog Integrated Circuits and Signal Processing; 2004; v.40, no.1, p.71-74, ISSN: 0925-1030

 

  1. “Biasing CMOS amplifiers using MOS transistors in subthreshold region,” Manoj Bikumandla, Jaime Ramírez-Angulo, Carlos Urquidi, Ramon G. Carvajal and Antonio J. Lopez-Martin, IEICE Electronics Express1, No.12, pp. 339-345, September 25, 2004, ISSN: 1349-2543

 

  1. “Rail-to-rail super class AB CMOS operational amplifiers ,”, Baswa, J. Ramirez-Angulo, A. J. López-Martín, R. G. Carvajal and M. Bikumandla Electronics Letters , January 6, 2005, vol. 41, No. 1

 

  1. ” Reconfigurable Logic Family Based on Floating Gates,” L.F. Cisneros_Sinencio, A. Diaz-Sanchez and J. Ramirez-Angulo, IEICE Transactions Fundamentals Comunn. Electronics and Systems ; Nov 2004; v.E87C, no.11, p.1884-1888, ISSN: 0916-8508

 

  1. “Rail-to-Rail super Class AB CMOS Operational Amplifiers,” S. Baswa, J. Ramirez-Angulo, A.J. Lopez-Martin, R.G. Carvajal and M. Bikumandla, Electronics Letters, vol. 41, No. 1, January 6, 2005, pp. 1-2, ISSN: 0013-5194

 

  1. ” Low-Voltage Wide gm Adjustment Range, Highly Linear BiCMOS OTA,”, Ramírez-Angulo, Milind S. Sawant, A. J. López-Martín, and R. G. Carvajal, ELEX: IEICE Electronics Express Letters, Vo.l 2, No. 4 pp. 127-132, February 25, 2005, ISSN: 1349-2543

 

  1. ”A Low-Power Low-Voltage OTA-C Sinuosidal Oscillator with a Large Tuning Range,” J. Galan, R. G. Carvajal, A. Torralba, F. Muñoz, and  Ramirez-Angulo, IEEE Transactions on Circuits and Systems I, vol. 52, no. 2 Feb. 2005, pp. 283-291

 

  1. “Novel Architectures of Class AB Current Mirrors with Programmable gain” C. Durbha, J. Ramirez-Angulo, R.G. Carvajal and A. Lopez-Martin, Journal of Analog Integrated Circuits and Signal Processing, 42,  February 2005, pp. 197-202, ISSN: 0925-1030.

 

  1. “A Compact Tunable Transconductor with high linearity,” M. Kachare, A.J. Lopez-Martin, J. Ramirez-Angulo and R.G. Carvajal, IEEE Transactions on Circuits and Systems II Express Briefs, 52, No. 2 February 2005, pp. 82-84, ISSN: 1549-7747

 

  1. “A new, true low voltage, Class-AB current mirror’, Torralba, R. G.Carvajal, M.Jiménez, F. Muñoz, J. Ramírez-Angulo IEICE Electronics Express ELEX ,  Vo. 2, No. 4, Feb. 25, 2005, pp. 103-107, ISSN: 1349-2543

 

  1. “Linearisation of MOS resistors using capacitive gate voltage averaging,” Ramirez-Angulo. M. Sawant, R.G. Carvajal and A. López-Martín, IEE Electronics Letters, vol. 41, No. 9, 28th April 2005, pp. 511-512, ISSN: 0013-5194

 

  1. “1.1 V Low-Power Sigma Delta Modulator for 14-bit, 16 kHz A/D Conversion using a new low-voltage class-AB op-amp,” F. Munoz, A.P. Vega-Leal, R.G. Carvajal, A. Torralba, J. Tombs and J. Ramirez-Angulo, Journal of Analog Integrated Circuits and Signal Processing, vol. 43, No. 1 April 2005, April 2005, pp. 31-38.

 

  1. “Low-Voltage Super Class AB CMOs OTA Cells with very high Slew Rate and Power Efficiency,”Antonio J. López-Martín , Sushmita Baswa , Jaime Ramirez-Angulo, and Ramón G. Carvajal, IEEE Journal of Solid State Circuits, Vol. 40, No. 5, May 2005. pp. 1068-1077. ISSN: 0018-9200

 

  1. “High-Speed High-precision Analog Rank Order Filter with O(n) complexity in CMOS Technology,” R Carvajal, J. Ramirez-Angulo, G.O.Ducoudray, and A. López-Martin IEEE Journal  of Solid State Circuits, Vol. 40, No. 6, June 2005.pp. 1238-1248.  ISSN: 0018-9200

 

  1. “ A CMOS Transconductor with Multidecade Tuning  Using Balanced Current Scaling in Moderate Inversion,” Ramirez-Angulo, C. Durbha, A. Lopez  and R. G. Carvajal, IEEE Journal of Solid State Circuits ,Vol. 40, No. 5, May 2005, pp. 1078-1083

 

  1. “Low Voltage High Performance Voltage Mode and Current mode WTA  Circuits Based On Flipped Voltage Follower,” Ramírez-Angulo, G. Ducoudray-Acevedo, R. G. Carvajal and A. López-Martín,  IEEE Transactions on Circuits and Systems II, vol. 52, No. 7, July 2005, pp. 420-423. ISSN: 1549-7747

 

  1. “The Flipped Voltage Follower: A useful cell for low-voltage low-power circuit design, “.G. Carvajal, J. Ramírez-Angulo, A. López-Martin, A. Torralba, J. Galán, A. Carlosena and F.Muñoz, IEEE Transactions on Circuits and Systems II vol. 52, No. 7, 2005, July 2005, pp. 1276-1291. ISSN: 1549-7747

 

  1. “1.5-V Current-Mode CMOS True RMS-DC Converter Based on Class-AB Transconductors ,” A. De La Cruz-Blas, A. López-Martín, A.Carlosena, and J. Ramírez-Angulo, IEEE Transactions and Circuits and Systems II vol. 52, No. 7, July 2005, pp. 376-379.

 

  1. Compact Implementation of High Performance CMOS Current mirror” Ramirez-Angulo, M.S. Sawant, A. López-Martin and R.G. Carvajal, Electronics Letters, vol. 41, No. 10, May 12, 2005, pp. 570-572. ISSN: 0013-5194

 

  1. “New Low-Voltage Fully Programmable CMOS Triangular/Trapezoidal Function Generator Circuit, “ M. Kachare, J. Ramirez-Angulo, R.G. Cravajal and A. Lopez-Martin, IEEE Transactions on Circuits and Systems I, 52, No. 10, October 2005, pp. 1-11, ISSN: 1549-8328

 

  1. “A proposal for high-performance CCII-based analogue CMOS design,” Antonio J. Lopez-Martin, Jaime Ramirez-Angulo; and Ramon G. Carvajal, International Journal of Circuit Theory and Applications, Int. J. Circ. Theor. Appl. 2005; vol. 33:379–391. ISSN: 0098-9886

 

  1. 1 V LOW-POWER SIGMA DELTA MODULATOR FOR 14-BIT, 16 KHZ A/D CONVERSION USING A NEW LOW-VOLTAGE CLASS-AB OP-AMP, , F. Munoz, A.P. Vega-Leal, R.G. Carvajal, A. Torralba, J. Tombs and J. Ramirez-Angulo, vol. 43, No. 1, pp. 31-38, Journal of Analog Intgrated Circuits and Sugnal Processing,. ISSN: 0925-1030

 

  1. “Low-voltage High Performance Compact All Cascode CMOS Current mirror,” Garimella, L. Garimella, J. Ramirez-Angulo, A. J. López-Martin and R.G. Carvajal, Electronics Letters pp. 8th December 2005, Volume 41, Issue 25 , p. 1359-1360, ISSN: 0013-5194

 

  1. “1.33mW, 2V CMOS Continuous-time Bandpass Filter With Two decades of Center Frequency Tuning Range,” J. Galan, Ramón G. Carvajal, A. Torralba, Fernando Muñoz, and J. Ramirez-Angulo, IEE Proceedings Part G 152, no.5, p.456-464, ISSN: 1350-2409

 

  1. “Micropower CMOS S&H circuit for Ambient Intelligence applications,” J. López-Martín, C.A. De La Cruz, X. Ugalde, R. G. Carvajal and J. Ramirez-Angulo, Electronics Letters, Aug 18 2005; v.41, no.17, p.935-936. ISSN: 0098-4094

 

  1. “Winner-Take all class AB input stage,” S. Baswa, A.J. Lopez-Martin, J. Ramirez-Angulo ,
    Journal of Analog Integrated Circuits and Signal Processing 46, No. 2: 149-152 Feb 2006, pp. 149-152, ISSN: 0925-1030

 

  1. “A Compact Low-Voltage Class AB Analogue Buffer,” Antonio Torralba, Ramón G. Carvajal,  Mariano Jiménez, Fernando Muñoz, and Jaime Ramírez-Angulo,  IEE Electronics Letters, vol. 42, No. 3, Feb. 3, 2006, ISSN: 0013-5194

 

  1. “Compact Power-Efficient Class AB CMOS Exponential Voltage to Voltage Converter,” De La Cruz-Blas, A., López-Martín, A. J., and Ramirez-Angulo, J., Electronics Letters, “IEE Electronics Letters, vol. 42, No. 3, Feb. 3, 2006. ISSN: 0013-5194

 

  1. “New Input Offset Compensation Scheme with Reduced Sensitivity to Charge Injection and Leakage,” Jaime Ramírez-Angulo, Annajirao Garimella, Lalitha Mohana Kalyani Garimella, Antonio J. Lopez-Martin and Ramon G. Carvajal Electronics Letters, Volume 42,  Issue 6,  16 March 2006 Page(s):340 – 341, ISSN: 0013-5194

 

  1. “Highly Linear Programmable Balanced Current Scaling Technique in Moderate Inversion,” A. J. López-Martin, J. Ramírez-Angulo, C. Durbha, and R. G. Carvajal, IEEE Transactions on Circuits and Systems II , Volume 53,  Issue 4,  April 2006 Page(s):283 – 285. ISSN: 1549-7747

 

  1. “New Low-Voltage Class AB/AB CMOS Op-Amp with Rail-to-Rail Input/Output Swing, Ramírez-Angulo, Milind S. Sawant, S. Thoutam A. J. López-Martín and R. G. Carvajal,  IEEE Transactions on Circuits and Systems II, Volume 53,  Issue 4,  April 2006 Page(s):289 – 293, ISSN: 1549-7747

 

  1. “The Universal Op-Amp and Applications in Continuous-time Linear weighted Voltage addition,” J. Ramirez-Angulo and F, Ledesma, IEEE Transactions on Circuits and Systems II , Volume 53,  Issue 5,  May 2006 Page(s):283 – 285, ISSN: 1549-7747

 

  1. Ramírez-Angulo, A. J. Lopez-Martin, A. Garimella, L. Garimella, and R. G. Carvajal , “New Gain Programmable Current Mirrors Based on Current Steering,” Electronics Letters, May 11 2006; v.42, no.10, p.559-560, ISSN: 0013-5194

 

  1. “Super Class AB OTAs based on adaptive techniques at the input stage and the active load,” Galan, Ramón G. Carvajal , J. Ramírez-Angulo, Antonio J. López-Martín and C. Rubia-Marcos , Journal of Low Power Electronics, vol. 2. pp. 1-6, 2006, ISSN 1546-1998

 

  1. “Simple Class AB voltage follower with slew rate and bandwidth enhancement and no extra static power or supply requirements, “J. Ramírez-Angulo, A. J. Lopez-Martin, R. G. Carvajal, A. Torralba and M. Jimenez, ,Electronics Letters, vol. 42, No. 14 , pp. 784-785

 

  1. “Multiple output linear V to I converters using split differential pairs and applications in all-pass OTAs, J. Ramirez-Angulo, A. Lopez-Martin, R.G. Carvajal, S.R.S. Garimella, L.K. Garimella and A. Garimella, Electronics Letters, 42, No. 14, pp. 783-784. ISSN: 0013-5194

 

  1. “Low-voltage Pseudo-differential Transconductor with Improved Tunability-Linearity Trade-off,” Calvo, S. Celma, J. Ramírez-Angulo and M.T. Sanz, Electronics Letters vol. 42, No. 15, July 20, 2006, pp. 862-863. ISSN: 0013-5194

 

  1. “A free but efficient class AB two-stage operational amplifier,” Jaime Ramirez-Angulo, Ramon Carvajal,  Antonio Lopez-Martin, and Juan A. Galan, IEEE Transactions on Circuits and Systems II, vol. 53-, No. 7,  July 2006, pp. 568-571.

 

  1. Ramirez-Angulo, C. Durbha, G.O. Ducoudray-Acevedo , RG. Carvajal and Antonio J. Lopez-Martin, “Highly linear Wide Input Range CMOS OTA Architectures Operating in Subthreshold and Strong Inversion,” special issue on “VLSI Design and Test”, Microelectronic Engineering, vol. 84 (2007) 273–279 , Feb. 2007, ISSN: 0167-9317

 

  1. “Super Class AB OTAs with Adaptive Biasing and Dynamic Output Current Scaling,”
    A. Galan ;A.J. Lopez-Martin. ;R.G.  Carvajal ; J. Ramirez-Angulo. ; Marco. C. Rubia-.
    IEEE Transactions on Circuits and Systems I,  vol. 54 No.3.pp.  449-457 March 2007 ISSN: 1549-8328.

 

  1. “Highly-accurate low-voltage source degenerated-based V–I converter using positive feedback,” Calvo, J. Ramırez-Angulo and S.R.S. Garimella Electronics Letters, vol. 43, No. 10, pp. 569-570, May 10, 2007

 

  1. ” 5-V 3-mW CMOS V-I converter with 75-dB SFDR for 6-Vpp input swings, A.J. Lopez-Martin, J. Ramírez-Angulo, A.  Lopez-Martin, and R. G. Carvajal, Electronics Letters, vol. 43, No. 6. pp.  336-338 March 15 2007

 

  1. “Single transistor high impedance tail current source with extended common mode input range and reduced supply requirements,” Ramírez-Angulo, A. J. Lopez-Martin, and R. G. Carvajal,  IEEE Transactions on Circuits and Systems II,  Vol. 54, No. 7, July 2007.pp. 581-585. ISSN: 1549-7747

 

  1. “A New High Swing, High Speed  CMOS WTA Using Differential Flipped Voltage Followers,” Ramírez-Angulo, J. Ezequiel Molinar-Solis, S. Gupta, R. G. Carvajal, and A. J. López-Martín IEEE Transactions on Circuits and Systems II, Vol. 54, No.8, August 2007, 668-672. ISSN: 1549-7747

 

  1. “A CMOS Analog Squarer circuit,” J. Ramirez-Angulo, A. Lopez-Martin and R. Chintham and R.G. Carvajal, Electronics Letters, vol. 43, No. 20, pp. 1059-1060, Sept. 2007

 

  1. , “Class-AB Fully Differential Voltage Followers,” J. Ramirez-Angulo A.J. Lopez-Martin,. R.G. Carvajal, B. Calvo,  IEEE Transactions on Circuits and Systems II, 55, No. 2, Feb 2008, pp. 131-135.

 

  1. “A power efficient and simple scheme for dynamically biasing cascode amplifiers and telescopic op-amps,” J. Ramirez-Angulo, M. Sawant, A.J.  Lopez-Martin and R.G. Carvajal, Integration, The VLSI Journal, Elsevier, available at elsevier.com/locate/vlsi , vol. 41, 2008, pp. 239-243

 

  1. “A Tunable Pseudo Differential OTA with -78dB THD consuming 1.25mW, C. Lujan Martinez, R.G. Carvajal, J. Galan, A Torralba, J. Ramirez-Angulo and A. Lopez-Martin, IEEE Transactions on Circuits and Systems I. Volume 55,  Issue 6,  June 2008 Page(s):527 – 531

 

  1. “A CMOS Linear Programmable Transconductor Suitable For Adjustable Gm-C Filters,”  Sanchez-Rodriguez, C.I. Lujan Martinez, R.G. Carvajal, J. Ramirez-Angulo and A. Lopez-Martin , IEE  Electronics letters, Volume 44,  Issue 8,  April 10 2008 pp. 505 – 506, ISSN: 0013-5194

 

  1. “CMOS Transconductors with Continuous Tuning Using FGMOS Balanced Output Current Scaling,” A.J. Lopez—Martin, J. Ramirez-Angulo, R.G. Carvajal and L. Acosta, IEEE Journal of Solid State Circuits, 43, No. 5, May 2008, pp. 1313 – 1323. ISSN: 0018-9200

 

  1. “Rail to Rail Fully Differential Sample and Hold Based on Clocked Differential Difference Amplifier Using Resistive Local Common Mode Feedback , “J. Ramirez-Angulo, C. Lujan-Martinez, C. Rubia-Marcos, R. G. Carvajal, J. Lopez-Martin, IET Electronics Letters, vol. 44, No. 11, May 27, 2008, pp. 656-658. ISSN: 0013-5194

 

  1. ,”Compact class AB CMOS current mirror,” Carvajal, R.G.; J.M. Algueta.A.J. Lopez-Martin, J. Ramirez-Angulo,  Electronics Letters, 44,  No. 23,  November 6 2008 pp:1335 – 1336, ISSN: 0013-5194

 

  1. A 1.2-V 140-nW 10-bit Sigma–Delta Modulator for Electroencephalogram Applications. “E. Lopez-Morillo,  G. Carvajal; F. Munoz.; H. El Gmili.; A.J. Lopez-Martin; J. Ramirez-Angulo.; E. Rodriguez-Villegas, IEEE Transactions on Biomedical Circuits and Systems,  Vol. 2,  No 3,  Sept. 2008 Page(s):223 – 230, ISSN: 1932-4545

 

  1. “Versatile Multidecade CMOS Voltage Controlled Oscillator with Accurate Amplitude and PWM Control,” Annajirao Garimella, Lalitha M Kalyani-Garimella, Jaime Ramírez-Angulo, Ramon G. Carvajal, Antonio J. Lopez-Martin, Springer, Analog Integrated Circuits and Signal Processing, Special issue on IEEE NEWCAS/MWSCAS 2007,   60   No. 1-2   Aug 2009, pp. 83-92. ISSN: 0925-1030

 

  1. “Low Voltage Differential Input Stage With Improved CMRR And True Rail To Rail Common Mode Input Range,” J. Ramirez-Angulo, S. Balasubramanian, A. J. Lopez-Martin, and R. G. Carvajal, IEEE Transactions on Circuits and Systems II, 55, No. 12, December 2008, pp. 1229-1234. I SSN: 1549-7747

 

  1. “Power-efficient class AB CMOS buffer,” A.J. Lopez-Martin, J. Ramirez-Angulo, R.G. Carvajal  and L. Acosta, Electronics Letters , Vol. 45, No. 2, Jan. 2009, pp. 89-90 ISSN: 0013-5194

 

  1. “Highly Linear Tunable CMOS Gm-C  Low-Pass Filter,” Acosta, M. Jimenez, R. G. Carvajal, A. J. Lopez-Martin, and J. Ramirez-Angulo, IEEE Transactions on Circuits and Systems I,  vol. 46, No. 1,pp.41-45,  Jan 2009. ISSN: 1549-8328

 

  1. “Programmable capacitance scaling scheme based on OTAs, J. Aguado-Ruiz, J. Hernandez-Alvidrez, A. Lopez-Martin, R.G. Carvajal, and J. Ramirez-Angulo, Electronics Letters, vol. 45, No. 3, pp. 159-161, Jan 2009. ISSN: 0013-5194

 

  1. “ A tunable highly linear CMOS transconductor with 80 dB of SFDR, “Mariano Jiménez-Fuentes, Ramón G. Carvajal, Lucía Acosta, Carlos Rubia-Marcos, Antonio López-Martín, and Jaime Ramirez-Angulo Integration, The VLSI Journal, Elsevier, special issue on DCIS 2006,  42, No. 3,  June 2009, Pages 277-285, I SSN: 0167-9260

 

  1. “Low voltage first order fully differential CMOS all-pass filter with programmable pole-zero”, L. Acosta, J. Ramirez-Angulo, R.G. Carvajal and A. Lopez-Martin Electronics Letters, vol. 45, No. 5, April 9, 2009, p. 385-386, ISSN: 0013-5194

 

  1. “Low-Voltage Tunable Pseudo-Differential Transconductor with High Linearity,”  Juan A. Galan, Manuel Pedro, Melitta Pennisi, Antonio J. Lopez-Martin, Ramon G. Carvajal, and Jaime Ramirez-Angulo ETRI Journal, vol. 31, No. 5, October 2009, . pp. 576-584. ISSN: 1225-6463

 

  1. “ Highly Linear Tunable CMOS Gm-C Low-Pass Filter, L. Acosta, M. Jimenez,  G. Carvajal, A. J. Lopez-Martin, and J. Ramirez-Angulo, IEEE Transactions on Circuits and Systems I, vol. 56, No. 10, October 2009, pp. 2145-2158. ISSN: 1549-8328

 

  1. ”Low-power baseband filter for zero-intermediate frequency digital video broadcasting terrestrial/handheld receivers,” C.I. Lujan-Martinez, R.G. Carvajal,  Torralba, A.J.  Lopez-Martin, J.  Ramirez-Angulo, Alvarado Circuits, Devices & Systems, IET (I.F. 0.548) Vol. 3,  No.  5, October 2009, pp. 291 – 301.I SSN: 1751-858X

 

  1. “Low Voltage MOS Translinear Analog Signal Processing,” C.A. De La Cruz Blas, A.J. Lopez-Martin, A Carlosena and J. Ramirez-Angulo, Circuits, Systems and Signal Processing, 28, Issue 6 (I.F. 0.798) December 2009 pp. 795-804. Available online at http://www.springerlink.com/content/mt123n80075r0555/fulltext.pdf, ISSN: 0278-081X

 

  1. “Tunable Linear MOS Resistors Using Quasi-Floating Gate Techniques, A. Torralba, C. Lujan-Martinez, RG Carvajal, J. Galan, M. Pennisi, J. Ramirez-Angulo and A, Lopez-Martin, IEEE Transactions on Circuits and Systems II, 56, No. 1, pp. 41-45, Jan 2009.I SSN: 1549-7747

 

  1. “DC Offset Control with Application in a Zero-IF 0.18 um CMOS Bluetooth Receiver Chain”A. Galan, T. Sanchez-Rodriguez,  R.G.Carvajal,A.J. Lopez-Martin and  J. Ramirez-Angulo, Analog Integrated Circuits and Signal Processing, Vol.: 65 Issue: 1 Pages: 15-20,  Oct 2010, I SSN: 0925-1030

 

  1. Design of Two-Stage Class AB CMOS Buffers: A Systematic Approach   Lopez Martin Antonio; J.M. Algueta Miguel, L.  Acosta and J. Ramirez-Angulo ETRI Journal  Volume: 33   Issue: 3   Pages: 393-400   June 2011, ISSN: 1225-6463
  2. Using Floating Gate and Quasi-Floating Gate Techniques for Rail-to-Rail Tunable CMOS Transconductor Design M. Algueta Miguel; A. J. Lopez-Martin; L. Acosta  and J Ramirez-Angulo: IEEE Transactions on Circuits and Systems  I-Vol. 58   Issue: 7, pp.: 1604-1614  July 2011, ISSN: 1549-8328
  3. Micropower high current-drive class AB CMOS current-feedback operational amplifier J. Lopez-Martin.; J. Ramirez-Angulo; R.G. Carvajal International Journal of Circuit Theory and Applications  Vol.: 39   Issue: 9   pp.  893-903   Sept.2011, ISSN: 0098-9886

 

  1. Highly linear voltage follower based on local feedback and cascode transistor with dynamic biasing I. Lujan; A. Torralba; R.G. Carvajal R. G. and J. Ramirez-Angulo. Electronics Letters, Vol.: 47   Issue: 4  pp.: 244- Feb. 17 2011 ISSN: 0013-5194
  2. Current-mode CMOS multiplier/divider circuit operating in linear/saturation regions , J. Lopez-Martin ; A. De La Cruz Blas Carlos  and J.  Ramirez-Angulo  Analog Integrated Circuits and Signal Processing Vol.: 66   Issue: 2   pp: 299-302  Feb. 2011, I SSN: 0925-1030

 

 

  1. High performance micropower class AB current mirror,” Fermin Esparza-Alfaro, Antonio Lopez-Martin, Jaime Ramírez-Angulo and Ramón G. Carvajal ‘ Electronics Letters, July 5, 2012, vol. 48, Issue: 14,  823-824. ISSN: 0013-5194

 

  1. “Noise Margin and Short Circuit Current in FGMOS Logics.,” Luis F. Cisneros Sinencio, Alejandro D iaz-Sanchez and Jaime Ramirez-Angulo, IEICE Electronics Express , VOL. 8, NO. 23, PP. 1967-1971 (December 2011), ISSN: 1349-2543

 

  1. Low Voltage Lazzaro’s WTA with enhanced loop gain , Molinar-Solis, Jesus E.; Garcia-Lozano, Rodolfo; Morales-Ramirez, Alejandra, Espinoza-Ortega, Oscar; Rocha-Perez, Miguel, Diaz-Sanchez, Alejandro, Ramirez-Angulo, Jaime, Vazquez-Leal, H , ,”. IEICE Electronics Express   9   Issue: 7   pp. : 648-653 , 2012 ISSN: 1349-2543

 

  1. Low-Voltage Highly-Linear class AB current mirror with Dynamic cascode Biasing, Esparza-Alfaro, F.; Lopez-Martin, A. J.; Ramirez-Angulo, J.; et al. Electronics Letters, : 48, Issue: 21 pp.: 1336-1337, Oct 11 2012, ISSN: 0013-5194

 

  1. Power Efficient Analog Design Based  on the class AB super source Follower, Lopez-Martin, Antonio J.; Acosta, Lucia; Garcia-Alberdi, Coro; et al. , International Journal of Circuit Theory and applications, : 40   Issue: 11   pp. 1143-1163,  Nov.  2012 ISSN: 0098-9886

 

  1. “Three Novel Improved CMOS C-Multipliers,” Jesus Aguado-Ruiz, Antonio J. Lopez-Martin, Jaime Ramirez-Angulo, International Journal of Circuit Theory, (I.F. 2.0), vol. 40, Issue 6 June 2012, pp. 607-616, ISSN: 0098-9886.

 

  1. “Highly Linear Wide-Swing Continuous Tuning of CMOS Transconductors, J.M. Algueta, A.J. Lopez-Martin, J. Ramirez-Angulo, and Ramon G. Carvajal, International Journal of Circuit Theory and applications, Volume: 42   Issue: 8   Pages: 831-841    2014,   ISSN: 0098-9886

 

  1. “Design of micropower class AB transconductors: A systematic approach,” Antonio J.Lopez-Martin, JoseM.Algueta, CoroGarcia-Alberdi, LuciaAcosta, Ramon G.Carvajal, JaimeRamirez-Angulo. Microelectronics Journal, available online, Volume: 44   Issue: 10   Special Issue: SI   Pages: 920-929   Published: Oct 2013. ISSN: 0026-2692.

 

  1. “Tunable Class AB CMOS Gm-C Filter Based on Quasi-Floating Gate Techniques,” Coro Garcia-Alberdi, Antonio J. Lopez-Martin, Lucia Acosta, Ramon G. Carvajal, and Jaime Ramirez-Angulo. IEEE Transactions on Circuits and Systems I , vol. 60, Issue 5, 2013, pp. 1300-1309.ISSN: 1549-8328

 

  1. “FGMOS Flip Flop for Low Power Signal Processing,” Luis F. Cisneros-Sinencio Alejandro Diaz-Sanchez and Jaime Ramirez-Angulo, International Journal of Electronics. Volume: 100   Issue: 12   Pages: 1683-1689   Published: Dec 1 2013, ISSN: 0020-7217

 

  1. Internally compensated LDO regulator based on the cascoded FVF,” J.M. Hinojo, C. Luján-Martínez, Torralba, and J. Ramírez-Angulo, Microelectronics Journal,  Vol. 54, Issue 10, Oct 2014, pp. 1268-1274, ISSN: 0026-2692.

 

  1. Micropower Class-AB VGA With Gain-Independent Bandwidth,” Garcia Alberdi, C. Aguado Ruiz J., Lopez-Martin A.J., Ramirez-Angulo J., IEEE Transactions on Circuits and Systems II Express Briefs, vol. 60, Issue 7, 2013 pp. 397- 401, ISSN: 1549-7747.

 

  1. Power Efficient Class AB op-amps with High and Symmetrical Slew Rate,” Aguado-Ruiz, J. ; Lopez-Martin, A. ; Lopez-Lemus, J. ; Ramirez-Angulo, J. IEEE Trans. On Very Large Scale Integration (VLSI), Volume: 22   Issue: 4   Pages: 943-947   Published: APR 2014, ISSN: 1063-8210

 

  1. Ultra Low-Power Analog Median Filters, Diaz-Sanchez, Alejandro; Lemus-Lopez, Javier; Rocha Perez, Jose Miguel; et al. Radioengineering, Volume: 22   Issue: 3   Pages: 916-920 Sept 2013 ISSN: 1210-2512

 

  1. “A low power analog front-end electronics in deep Submicrometer CMOS technology based on gain enhancement techniques,” Juan Antonio Gomez-Galan,; Trinidad Sanchez-Rodriguez, Manuel Sanchez-Raya,; Ismael Martel,  Antonio Lopez-Martin,  Ramon G Carvajal,  Jaime Ramirez-Angulo, Nuclear Inst. and Methods in Physics Research, Volume: 749   Pages: 90-95, June 2014 ISSN:

 

  1. “Highly linear micropower class AB current mirrors using Quasi-floating Gate transistors,” Esparza-Alfaro, A. J.Lopez-Martin, R. G.Carvajal, Jaime Ramirez-Angulo, Microelectronics  Journal pp. vol. 45, February 2014  1261-1267,  ISSN: 0026-2692

 

  1. “A 1.2-V 450-µW Gm-C Bluetooth Channel Filter using a Novel Gain-Boosted Tunable Transconductor,” J.Galan, Sanchez. R.G. Carvajal, J. Ramirez-Angulo, IEEE Transactions on Very Large Scale Integration Systems, vol. 23, No. 8 pp. 1572-1576,  August 2015, ISSN: 1063-8210

 

  1. “Rail to Rail CMOS Complementary Input Stage with Only One Active Differential Pair at a Time, R. Valero, A. Roman-Loera, J. Ramírez-Angulo, N. Medrano and S. Celma, IEICE ELEX Electronics Express, Vol. 11, No. 12,  pp. 1-5, June 2014, ISSN: 1349-2543

 

  1. “High Gain Amplifier with Enhanced Cascoded Compensation,”J Lemus-Lopez, A. Diaz-Sanchez, C. Muniz-Montero, J. Ramirez-Angulo, J.M. Rocha-Perez, L.A. Sanchez-Gaspariano, RADIOENGINEERING, Vol. 18, No. 1, June 2013, pp. 11-18. ISSN: 1210-2512

 

  1. “Realistic Model for the Multiple-Input Floating-Gate Transistor,” , Cisneros Sinencio, L.F. Diaz-Sanchez A, Ramirez-Angulo J, IEEJ International Transactions on Electrical and Electronic Electronic Engineering,.Vol. 9, Issue 6, pp. 692-694, 2014 ISSN: 1931-4973

 

 

  1. “Slew rate enhancement based on the use of squaring circuits, “ R. Valero, S. Thoutam, J. Ramírez-Angulo, A. Lopez-Martin, R. G. Carvajal, Electronics, Letters, Vol. 51, No. 3, pp. 219-220, February 5, 2015, ISSN: 0013-5194

 

 

  1. “Free Class AB/AB op-amp with high current enhancement, Alejandro Roman-Loera, Jaime Ramirez-Angulo, Antonio J. Lopez-Martin and Ramon G. Carvajal, Electronics Letters, vol. 51, Issue 3, pp. 215-217, February 5, 2015, ISSN: 0013-5194

 

  1. “Low Power Variable Gain amplifier Based on Novel Transconductor, “Trinidad Sanchez, Juan Antonio Gomez-Galan, Manuel Pedro, Antonio Lopez-Martin, Ramon Gonzalez Carvajal and  Jaime Ramirez Angulo, IET Circuits Devices and Systems, vol. 9, Issue 2, 2015, pp. 105-110. ISSN: 1350-2409

 

  1. “Design of CMOS amplifiers with offset rejection using positive-feedback QFG transistors,” M. Algueta-Miguel, C. A. De la Cruz Blas, A. J. López-Martín and J. Ramírez-Angulo, International Journal of Analog Integrated Circuits and Signal Processing , Volume: 85   Issue: 1   Special Issue: SI   Pages: 217-221, OCT 2015

 

 

  1. “Constant gm R-R op-amp using a single differential pair and switched level shifters, “ R. Valero, Alejandro Roman-Loera, J. Ramírez-Angulo, A. Lopez-Martin, R. G. Carvajal, IEEE Transactions on Circuits and Systems II ,(rejected to resubmit)

 

  1. “Power-Saving Channel Selection Filtering Techniques, “ Coro Garcia-Alberdi, Antonio J. Lopez-Martin, Ramon G. Carvajal, and Jaime Ramirez-Angulo, IEEE Transactions on VLSI (under review), ISSN: 2156-3357

 

  1. “Weak Inversion Topologies of Analog median Filters,” A. Diaz-Sanchez, J.M. Rocha-Perez, J. Lemus-Lopez, J. Ramirez-Angulo, G. A, Munoz-Hernadez, C.A. Gacios-Marin, Superficies y Vacio , Vol. 22, No. 4, December 2009, pp. 6-9, ISSN:1665-3521

 

  1. “A Noise-Robust Positive-Feedback Floating-Gate Logic, Luis”, F Cisneros-Sinencio, Alejandro Diaz Sanchez and Jaime Ramirez-Angulo Manuscript ID: 2015CDP0004, Accepted September 24 2015, IEICE Transactions on Electronics

 

 

 

 

 

 

 

6b. Book chapters

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  1. “Frequency and Impedance Transformations”, J. Ramírez-Angulo section 13.67, pp. 2192-2204  CRC Handbook on Circuits and Filters, 1995.

 

  1. “Low Voltage Analog BiCMOS Circuit Building Blocks” IEEE Press book on Low Voltage Low Power Integrated Circuits and Systems. IEEE Press, New York, 1999, pp. 207-242.

 

  1. Section: “Bandpass-Filter,” Encyclopedia of Electrical and Electronics Engineering, John Wiley & Sons (1999).

 

  1. Proceedings of the 42nd Midwest Symposium on Circuits and Systems

 

  1. Michael Steyaert, Arthur H.M/ Roermund, Arthur , Herman Casier,(Eds.)Analog Circuit Design, Steyaert, 2008, XII, Springer Science-Business Media, Part II, chapter 9, “Low-Voltage Power-Efficient Amplifiers for Emerging Applications;”pp. 147-195,   .Lopez-Martin et al.ISBN: 978-1-4020-8943-5.

 

  1. Ramirez-Angulo, Trinidad Sanchez-Rodriguez, Chhaya Patil, Ramon G. Carvajal and Antonio Lopez-Martin”Gain enhancement and low voltage techniques for analog circuits in deep submicrometer CMOS Technology Chapter 15 Book: CMOS Nanoelectronics Analog and RF VLSI circuits” Edited by  K. Iniewsky, ISBN 13: 9780071755658 Published July 2011.

 

  1. Chapter 12 “The Flipped Voltage Follower: Theory and Applications,” Jaime Ramirez-Angulo, Maria Rodanas Valero Bernal, Antonio Lopez-Martin, Antonio Torralba, Ramon G. Carvajal. Santiago Celma Pueyo and Nicolas Medrano-Marques. In book: Analog/RF & Mixed Signal Circuit Sys Design, M. Fakhfakh (ed)  Springer Verlag, Berlin-Heidelberg,  269-287, DOI: 10.1007/978-3-642-36329-0_12, ISBN 978-3-642-36329-0, Published 2013.

 

6c. Conference Papers

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  1. “Implementation of Surface Acoustic Wave Filters for Application in Specific Communication and Electronic Problems (in spanish)”, J. Ramírez‑Angulo and A. Serrano. IEEE MEXICON 76. Mexico City, July 7‑10, pp. II35‑II41, 1976.

 

  1. “Acoustic Surface Wave Filters (in spanish)”, J. Ramírez‑Angulo and Serrano  XVIII Congress of the Mexican Physics Society, Veracruz, Mexico December 8‑11, pp. 21, 1975.

 

  1. “Design of a Traffic Measurement System for Automatic Networks (in spanish)”, J. Ramírez‑Angulo and V. Aviles‑Garcia, Second Congress of the Mechanical and Electrical Engineers Society, Mexico City, November 11‑12, session D, 1976.

 

  1. “Exploration of the Acceptability Region: A New Low Cost Design Centering Procedure”, J. Ramírez‑Angulo, IEEE‑MEXICON 82, Mexico City, October 1982.

 

  1. “Design of SAW Filters with Arbitrary Magnitude and Phase Response Specifications (in spanish)”, J. Ramírez‑Angulo, XXV Congress of the Mexican Physics Society, Jalapa, Mexico, November 22‑26, pp. 13, 1982.

 

  1. “Efficient Non‑Deterministic Design Centering Based on the Concept of Dominant Constraints”, J. Ramírez‑Angulo and E. Luder, IEEE International Symposium on Circuits and Systems, Newport Beach, CA., May 2‑4, pp. 546‑549, 1983.

 

  1. “Circuit Yield Improvement by One Dimensional Exploration of the Acceptability Region”, J. Ramírez‑Angulo, 26th Midwest Symposium on Circuits and Systems, Puebla, Mexico, August 15‑16, pp. 477‑480, 1983.

 

  1. “Fabrication in Mexico of thin Film Hybrid Microcircuits (in spanish)”, J. Ramírez‑Angulo, A.Ortiz and J. Fragoso, IEEE‑MEXICON 83, Cuernavaca, Mexico, November 1982.

 

  1. “Fabrication of Thin Film Resistors and Capacitors (in spanish)”, J. Ramírez‑Angulo and A. Ortiz, XXVI Congress of the Mexican Physics Society, Puebla, Mexico, November 1983.

 

  1. “Component Quantization Effects on Continuous Time Filters”, J. Ramírez‑Angulo, R. L. Geiger and E. Sánchez‑Sinencio, IEEE International Symposium for Circuits and Systems, Kyoto, Japan, June 5‑7,  1423‑1426, 1985.

 

 

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  1. “FIRE: A Computer Program to predict the Peformance of Laser Trimmed Film Resistors”, Ramírez‑Angulo, R. L. Geiger and E. Sánchez‑Sinencio, 36th Electronics Components Conference, Seattle Washington, May 5‑7, pp. 405‑411, 1986.

 

  1. “A Circuit Theoretical Approach to the Sensitivity Analysis of Laser Trimmed Film Resistors”, Ramírez‑Angulo, R. L. Geiger and E. Sánchez‑Sinencio, 1986 IEEE Int. Symposium on Circuits and Systems, San Jose, CA, May 5‑7, pp.1201‑1206, 1986.

 

  1. “A Computer‑Aided Design Program for Reduction of Total Capacitance in Cascade SC‑Filters”, E. Sánchez‑Sinencio, J.Ramírez‑Angulo and R. L. Geiger, 29th Midwest Symposium on Circuits and Systems, Lincoln, NE, August 10‑12, pp. 597‑599, 1986.

 

  1. “A Computer‑Aided Circuit Design Algorithm Based on a Random Direction and Radial Search”, J. Ramírez Angulo and E. Sánchez‑Sinencio, 29th Midwest Symposium on Circuits and Systems, Lincoln, NE, August 10‑12, pp.897‑901, 1986.

 

  1. “A Systematic Approach for the Characterization of RC‑distributed Elements”, J. Ramírez‑Angulo, E. Sánchez‑Sinencio and R. L. Geiger, IEEE‑MEXICON 86, Guadalajara, Mexico, November 8‑10, pp. 1701‑1704, 1986.

 

  1. “Design of Active Filters for Maximum GB‑variations”, J. Ramírez‑Angulo, 30th Midwest symposium on Circuits and Systems, Syracuse, New York, August 17‑18, pp. 781‑784, 1987.

 

  1. “Computer‑Aided Design and Evaluation of New Film Resistor Structures based on a Network Sensitivity Measure”, J. Ramírez‑Angulo and R. L. Geiger, IEEE Israel Symposium on Circuits, Systems and Control, Herzliya, Israel, May 30‑June 1, pp. 6.31‑ 6.34, 1988.

 

  1. “Bandpass OTA‑C Filter Structures, Tunability Considerations and Quantization Effects”, J. Ramírez‑Angulo and E. Sánchez‑Sinencio, IEEE 2nd Israel Symposium on Circuits, Systems and Control, Herzliya, Israel, May 30‑June 1 pp. 7.21‑7.24, 1988.

 

  1. “A Method to Relax the Design of Active Filters Against Large GB‑variations”, J. Ramírez‑Angulo, 1988 IEEE International Symposium on Circuits and Systems, Espoo, Finland, pp. 2415‑2418, June 6‑9, 1988.

 

  1. “Comparison of Biquadratic OTA‑C Filters from the Tuning Point of View”, J. Ramírez Angulo and E. Sánchez‑Sinencio, 31th Midwest Symposium on Circuits and Systems, St. Louis, Mi, August 10‑12, pp. 510‑514, 1988.

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  1. “A Program for the Design of Filters with Specifications for Magnitude and Group‑Delay Response”, M. Kobe, J. Ramírez‑Angulo and E. Sánchez‑Sinencio, 1988 IEEE‑Region 9 Conference, Mexico City, October 11‑14, 1988.

 

  1. “OTA‑Based Nonlinear Function Approximation”, E.Sánchez Sinencio, J. Ramírez‑Angulo and B. Linares‑Barranco, 1989 IEEE International Symposium on Circuits and Systems, Portland, Ore, pp. 2415‑2418, May 8‑11, pp. 96‑99.

 

  1. “Active Compensation of Operational Transconductance Amplifier Filters Using Partial Positive Feedback”, J. Ramírez‑Angulo, and Sánchez‑Sinencio, Midwest Symposium on Circuits and Systems, Champaign, Ill., pp. 1206‑1210, August 15‑16, 1989.

 

  1. “Programmable Piecewise‑Linear Function Synthesizers Using Operational Transconductance Amplifiers”, J. Ramírez‑Angulo, B. Linares‑Barranco, E. Sánchez‑Sinencio and A. Rodriguez‑Vazquez, 1989 European Conference on Circuit Theory and Design, Brighton, UK, pp. 452‑456, 5‑8 September 1989.

 

  1. “All MOS‑Transistors Continuous‑Time Filters in CMOS‑Technology”, B. Linares‑Barranco, E. Seaberg and J. Ramírez‑Angulo, IEEE‑Mexicon 89, Mexico, Sept. 17‑22 1989.

 

  1. “Distributed RC‑Filters With Linearized MOS‑Transistors in MOS‑Technology”, B. Linares‑Barranco, E. Seaberg and J. Ramírez‑Angulo, IEEE‑1990 International Symposium on Circuits and Systems, New Orleans, Lousiana, pp. May 1‑3 1990, pp. 2385‑2388.

 

  1. “A Precision Broadband Voltage Rectifier in CMOS Technology”, J. Ramírez‑Angulo, IEEE‑1990 International Symposium on Circuits and Systems, New Orleans, Lousiana, May 1‑3 1990, pp. 1724‑1727.

 

  1. “Maximum Value of the Base Resistance of Vertical Bipolar Transistors”, B. Linares‑Barranco, E. Seaberg and J. Ramírez‑Angulo, IEEE‑1990 International Symposium on Circuits and Systems, New Orleans, Lousiana, May 1‑3 1990, pp. 3182‑3185.

 

  1. “Analog Neural Networks for Real‑Time Constrained Optimization”, A. Rodriguez‑Vazquez, R. Dominguez‑Castro, J.L.Huertas, E.Sánchez‑Sinencio, B.Linares‑Barranco and J. Ramírez‑Angulo, IEEE‑1990 International Symposium on Circuits and Systems, New Orleans, Lousiana, May 1‑3 1990, pp. 1867‑1870.

 

  1. “FIESTAII: A PC‑ Filter Educational Synthesis Teaching Aid”, J.Ramírez‑Angulo, M. Kobe and E.Sánchez‑Sinencio, 33rd‑ Midwest Symposium on Circuits and Systems, Calgary, Canada, August 12‑14 1990, pp. 504-507.

 

 

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  1. “A Current Mode CMOS‑Cellular Neural Network”, J. Varrientos, J. Ramírez‑Angulo and E. Sánchez‑Sinencio, 33rd‑ Midwest Symposium on Circuits and Systems, Calgary, Canada, August 12‑14 1990, pp. 277-280.

 

  1. “A Program for the Design of Continuous Time Filters”, J. Ramírez-Angulo, M.R. Kobe, E. Sánchez-Sinencio, 1990 IEEE Region 9 Conference, Monterrey Mexico, Oct 1-4, 1990, vol. I, pp. 1-4.

 

  1. “Cellular Neural Networks Implementation: A Current Mode Approach”, J.E.Varrientos, J.Ramírez-Angulo and E.Sánchez-Sinencio, Proceedings of IEEE International Workshop on Cellular Neural Networks and their Applications, Budapest Hungary December 16-19, 1990, pp. 216-220.

 

  1. “Current Mode Continuous-Time Filters: Two Design Approaches”, M. E. Robinson, J. Ramírez-Angulo and E. Sánchez-Sinencio, 34th Midwest Symposium on Circuits and Systems, Monterey, California, May 14-17, 1991.

 

  1. “OTA Extended Adjustment Range and Linearization Via Programmable Current Mirrors”, W. J. Adams and J. Ramírez-Angulo, 34th Midwest Symposium on Circuits and Systems, Monterey, California, May 14-17, 1991.

 

  1. “High Selectivity, High Frequency Continuous-Time Filters Using Multiple Output OTAs”, Jaime Ramírez-Angulo, E. Sánchez-Sinencio and Matthew Howe, 1991 IEEE International Symposium on Circuits and Systems, pp. 1351-1354 Singapore, June 11-14, 1991.

 

  1. “Improvement of Laser Trimmed Film Resistor Stability by Selection of Optimal Trim Paths”, J. Ramírez-Angulo, R. Wang and Randall L. Geiger, 1991 IEEE International Symposium on Circuits and Systems, pp. 2188-2191, Singapore, June 11-14 1991.

 

  1. “OTA Extended gm Adjustment Range Via Electronically Programmable Current Mirrors”, W. J. Adams and J. Ramírez-Angulo, 1991 IEEE International Symposium on Circuits and Systems, pp. 2553-2556, Singapore, June 11-14 1991.

 

  1. “Circuit implementations of Extended Transconductance Linearization Technique”, W.J. Adams and J. Ramírez-Angulo, 1991 European Conference on Circuit Theory and Design, September 2-6, 1991, Copenhagen, Denmark.

 

  1. “Wide gm Adjustment Range, Highly Linear OTA with Linear Programmable Current Mirrors,” J. Ramírez-Angulo and I. Grau, Proceedings of 1992 IEEE International Conference on Circuits and Systems, pp. 1372-1375, San Diego CA, May 10-13 1992.

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  1. “Applications of Composite BICMOS Transistors in Analog Circuits,” J. Ramírez-Angulo, M. Deyong and W. J. Adams, Proceedings of 1992 IEEE International Conference on Circuits and Systems, pp. 1262-1266, San Diego CA, May 10-13 1992.

 

  1. “Architectures for Analog VLSI implementation of Neural Networks for Solving Linear Equations with Inequality Constraints,” A. Cichocki, J. Ramírez-Angulo and R. Unbehauen, Proceedings of 1992 IEEE International Conference on Circuits and Systems, pp. 1529-1532, San Diego CA, May 10-13 1992.

 

  1. “A Piecewise Linear Function Approximation using Current Mode Circuits,” J. Ramírez-Angulo, E. Sánchez-Sinencio and A. Rodriguez-Vazquez, Proceedings of 1992 IEEE International Conference on Circuits and Systems, pp. 2021-2024, San Diego CA, May 10-13 1992.

 

  1. “The folded Gibert Cell: A low-voltage, high performance CMOS multiplier”, J. Ramírez-Angulo and Sun Ming-Chen, Proceedings of 35th Midwest Symposium on Circuits and Systems, pp. 20-23, August 9-12, 1992 Washington, D.C.

 

  1. “Modules for a digitally controlled analog signal processor with highly reconfigurable architecture”, J. Ramírez-Angulo, R. Paz and R. Parra, Proceedings of 35th Midwest Symposium on Circuits and Systems, pp. 458-461, August 9-12, 1992 Washington, D.C.

 

  1. “A hybrid OTA with very wide adjustement range”, M. DeYong and J. Ramírez-Angulo, Proceedings of 35th Midwest Symposium on Circuits and Systems,pp. 953-956, August 9-12, 1992 Washington, D.C.

 

  1. “CMOS cells for analog VLSI Laplace equation solver based on the resistive analogy method”, J. Ramírez-Angulo, M. DeYong and Sun Ming-Chen, Proceedings of 35th Midwest Symposium on Circuits and Systems, pp. 597-600, August 9-12, 1992 Washington, D.C.

 

  1. “A BiCMOS Low Distortion Tunable Transconductor for Continuous-Time Filters”, M. Ali, M. Howe, E. Sánchez-Sinecio and J. Ramírez-Angulo Proceedings of 35th Midwest Symposium on Circuits and Systems, pp. 571-574, August 9-12, 1992 Washington, D.C.

 

  1. “A BiCMOS current buffer-rectifier”, M. Ali, M. Howe, E. Sánchez-Sinencio and J. Ramírez-Angulo Proceedings of 35th Midwest Symposium on Circuits and Systems, August 9-12, 1992 Washington, D.C.

 

  1. “A second generation Linear low-voltage BiCMOS OTA,” J. Ramírez-Angulo and K. H. Treece, Proceedings of the 1993 IEEE International Conference on Circuits and Systems, pp. 1172-1175, May 5-7 1993, Chicago Il.

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  1. “High frequency compensated Current-mode ladder filters using multiple output OTAs,” J. Ramírez-Angulo and E. Sánchez-Sinencio, Proceedings of the 1993 IEEE International Conference on Circuits and Systems, pp. 1412-1415, May 5-7 1993, Chicago Il.

 

  1. “Low voltage programmable analog FIR Filters using voltage followers and multipliers,” J. Ramírez-Angulo and A. Diaz-Sánchez, Proceedings of the 1993 IEEE International Conference on Circuits and Systems, pp. 1408-1411, May 5-7 1993, Chicago Il.

 

  1. “Linearity accuracy and bandwidth Considerations in wideband CMOS voltage amplifiers,” J. Ramírez-Angulo, R. Sadkowski and E. Sánchez-Sinencio, Proceedings of the 1993 IEEE International Conference on Circuits and Systems, pp. 1251-1254, May 5-7 1993, Chicago, Il.

 

  1. “Novel Digitally trimmable MOS current mirrors,” J. Ramírez-Angulo, Proceedings of the 1993 IEEE International Conference on Circuits and Systems, pp. 974-977, May 5-7 1993, Chicago Il.

 

  1. “A master-slave scheme for tuning the gain of transconductance amplifiers with high absolute accuracy,” J. Ramírez-Angulo, Proceedings of the 1993 IEEE International Conference on Circuits and Systems, pp. 1176-1179, Chicago, Il, May 5-7 1993.

 

  1. “Highly Linear Four Quadrant analogue BiCMOS multiplier for +-1.5V”, J. Ramírez-Angulo, Proceedings of IEEE 1993 International Symposium on Circuits and Systems, pp. 1467-1470, Chicago, Il, May 5-7 1993.

 

  1. “IDD spectrum and temporal analysis test techniques for VLSI circuits,” J. Beasley, H. Ramamurthi, M. DeYong and J. Ramírez-Angulo, Proceedings of the 1993 European Conference on Circuit Theory and Design, pp. 659-664, Davos, Switzerland, August 30 – September 3, 1993.

 

  1. “BiCMOS High Frequency Linear Bandpass-Based Current mode Oscillator for 3V supply Oscillator”, J. Ramírez-Angulo and E. Sánchez-Sinencio, Proceedings of the 1993 European Conference on Circuit Theory and Design (ECCTD’93), pp. 1119-1132, Davos, Switzerland, August 30 – September 3, 1993.

 

  1. “iDD Pulse Response Testing of Analog and Digital Circuits,” J. S. Beasley, H. Ramamurthy, J. Ramírez-Angulo and M. Deyong, 1993 International Test Conference, pp. 626-634, October 17-21, Baltimore Ma, 1993.

 

  1. “Use of MOSIS custom designed CMOS and BiCMOS transistor Arrays for teaching VLSI courses”, J. Ramírez-Angulo and J. Beasley, Proceedings of 36th Midwest Symposium on Circuits and Systems, Detroit Mi, August 16-18, pp. 1176-1179, 1993.

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  1. “Design and implementation of a digital control for a continuous-time nonrecursive (FIR) filter,” A. Martinez, L. Ortiz, A. de Luca, H. Perez and J. Ramírez-Angulo, Proceedings of 36th Midwest Symposium on Circuits and Systems, pp. 280-283, Detroit Mi, August 16-18, 1993.

 

  1. “Continuous Time High Frequency Programmable Nonrecursive Filters,” J. Ramírez-Angulo, A. de Luca, and H. Perez-Meana, Proceedings of 36th Midwest Symposium on Circuits and Systems, Detroit Mi, August 16-18, pp. 153-156, 1993.

 

  1. “A Parallel Form Decision Feedback Equalizer,” H. Perez-Meana, A. de Luca and J. Ramírez-Angulo, Proceedings of 36th Midwest Symposium on Circuits and Systems, Detroit Mi, August 16-18, pp. 1215-1218, 1993.

 

  1. “Low Voltage BiCMOS Membership Function Circuit Building Block for Analog VLSI Fuzzy Control Implementation,” J. Ramírez-Angulo, S. Badruzzamman and J. Coronado, Proceedings of IFIS-93: Industrial Fuzzy Control and Intelligent Systems, pp. 42-46, December 1-3, 1993, Houston, TX.

 

  1. “Two approaches for VLSI current-mode filters based on canonical control structures,” J. Ramírez-Angulo and E. Sánchez-Sinencio, IEEE International Symposium on Circuits and Systems, pp. 669-672, London, England, May 30- June 2, 1994

 

  1. “Analog VLSI implementations of adaptive membership function for fuzzy controllers,” J. Ramírez-Angulo, IEEE International Symposium on Circuits and Systems, London, England, May 30- June 2, 1994

 

  1. “Low Voltage, High Slew Rate Bipolar and BiCMOS op-amp architectures with rail to rail common mode input and output swing capabilities,” J. Ramírez-Angulo, 1994 IEEE International Symposium on Circuits and Systems, pp. 743-746, London, England, May 30- June 2, 1994

 

  1. “Real Time Solution of Laplace equation Using Analog VLSI circuits,” J. Ramírez-Angulo, K. Treece and M. DeYong, 1994 IEEE International Symposium on Circuits and Systems, pp. 95-98, London, England, May 30- June 2, 1994

 

  1. “Current mirrors with low input voltage requirements for built in current sensors,” J. Ramírez-Angulo, 1994 IEEE International Symposium on Circuits and Systems, pp. 529-532, London, England, May 30- June 2, 1994

 

  1. “Novel linear gain programmable Class AB current mirrors with constant bandwidth”, J. Ramírez-Angulo, 1994 IEEE International Symposium on Circuits and Systems, pp. 545- 548, London, England, May 30- June 2, 1994

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  1. “A Programmable 1.8-18MHz, High Q Fully Differential Continuous Time Filter with 1.5V-2V Power supply,” J.T. Nabitch, E. Sánchez-Sinencio and J. Ramírez-Angulo, 1994 IEEE International Symposium on Circuits and Systems, pp. 653- 657, London, England, May 30- June 2, 1994

 

  1. “Current mirrors with low input voltage requirements for built in current sensors,” J. Ramírez-Angulo, 37th Midwest symposium on Circuits and Systems, pp. 107-110, Lafayette, LA, August 3-5, 1994

 

  1. “Low Voltage BiCMOS Comparator for Charge Threshold Detection,” J. Ramírez-Angulo, G. Gonzalez-Altamirano and A. de Luca, 37th Midwest symposium on Circuits and Systems, pp. 1137-1140, Lafayette, LA, August 3-5, 1994

 

  1. “Low Voltage Current Mode and Voltage Mode Min and Max Circuit Building Blocks for Analog CMOS Fuzzy Processors,” 3rd International Conference on Fuzzy logic and Computing, Lizuka, Japan, August 1-3, 1994.

 

  1. “Analog Propose of Adaptive Filter Using All Pass Functions and LMS Approach,” Martinez-Gonzalez, L. Ortiz-Balbuena, H. Perez-Meana, L. Nino de Rivera and J. Ramírez-Angulo, Proceedings of  International Symposium on Information Theory and Applications, Sydney Australia, 20-24 November 1994, pp. 1351-1355.

 

  1. “Design of VLSI Systems at New Mexico State University,” J. Ramírez-Angulo, SACNAS Conference, January 5-9 1995, El Paso, TX.

 

  1. “A BiCMOS Universal Membership Function Circuit,” J. Ramírez-Angulo, 1995 IEEE International Symposium on Circuits and Systems, Seattle, WA, April 30, May 3, 1994, pp.275-278

 

  1. “Current-Mode and Voltage Mode VLSI Fuzzy Processor Architectures,” J. Ramírez-Angulo, K. Treece, P. Andrews and T.Choi, 1995 IEEE International Symposium on Circuits and Systems, Seattle, WA, April 30, May 3, 1994, pp.1156-1159.

 

  1. “Yet another low voltage four quadrant CMOS multiplier,” J. Ramírez-Angulo, 38th Midwest Symposium on Circuits and Systems, 405-408, Rio de Janeiro , Brazil, August 13-16, 1995.

 

  1. “OTA-GS filters: The new Face of RC active filters,” J. Ramírez-Angulo,and G. Gonzalez-Altamirano, 38th Midwest Symposium on Circuits and Systems, 1329-1332, Rio de Janeiro , Brazil, August 13-16, 1995.

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  1. “Low Supply Voltage OTA architectures Using Floating Gate Transistors, S.C. Choi, and J. Ramírez-Angulo, 38th Midwest Symposium on Circuits and Systems, 158-161, Rio de Janeiro , Brazil, August 13-16, 1995.

 

  1. “Building Blocks of Filter Tuning System Using Analog VLSI Fuzzy Logic Controller,” S.C. Choi, E. Sánchez-Sinencio and J. Ramírez-Angulo, 38th Midwest Symposium on Circuits and Systems, 389-392, Rio de Janeiro , Brazil, August 13-16, 1995.

 

  1. “Analog VLSI Implementation of a New Algorithm for Solving Generalized Systems of Linear Equations,” N.C. Carneiro, L. Caloba and J. Ramírez-Angulo, 38th Midwest Symposium on Circuits and Systems, 965-968, Rio de Janeiro , Brazil, August 13-16, 1995.

 

  1. “A new Algorithm for Analog Matrix Inversion,” N.C. Carneiro, L. Caloba and J. Ramírez-Angulo, 38th Midwest Symposium on Circuits and Systems, 401-404, Rio de Janeiro , Brazil, August 13-16, 1995.

 

  1. “An idd Transient Analysis Technique for Defect Detection in Digital Integrated Circuits,” J. Beasley, J. Ramírez-Angulo and R. Steiner, 38th Midwest Symposium on Circuits and Systems, 286-289, Rio de Janeiro Brazil, August 13-16, 1995.

 

  1. “Comparative study of publications of Mexico listed in Science Citation Index,”(in spanish), J. Ramírez-Angulo, VI Annual Meeting of the Researchers of the state of Chihuahua, Chihuahua City, Mexico, December 1-3 ,1995

 

  1. “Continuous Time Adaptive Filter Structure,” L. Ortiz-Balbuena, A. Martinez-Gonzalez, H. Perez-Meana, L. Nino de Rivera and J. Ramírez-Angulo, IEEE ICASP International Conference on Acoustics, Speech and Signal Processing, pp. 1061-1064, Detroit, Mi. May 1995.

 

  1. “Sistemas Analogicos VLSI,” Ramírez-Angulo, Electro 85, (Plenary Talk), 23-27 Octubre 1995

 

  1. “Implementation of VLSI analog adaptive filters,” Diaz-Sánchez and J. Ramírez-Angulo, Proceedings of IEEE Conielecomp, Puebla, Mexico, February 28-March 1, 1996

 

  1. “High Speed IDDQ Current Sensors for VLSI System Testing,” Ramírez-Angulo and G. González-Altamirano, 1996 IEEE International Symposium on Circuits and Systems, Atlanta, Georgia, May 8-12, 1996, pp. I-389-392.

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  1. “Low Voltage continuous time filters with OTAs and gain stages,” Ramírez-Angulo and G. González-Altamirano, 1996 IEEE International Symposium on Circuits and Systems, Atlanta, Georgia, May 8-12, 1996, pp. II 493-496

 

  1. “A +-0.75V BiCMOS multiplier with rail-rail input signal swing”, Ramírez-Angulo, 1996 IEEE International Symposium on Circuits and Systems, Atlanta, Georgia, May 8-12, 1996, pp. 242-245.

 

  1. “Analog VLSI Fuzzy Processor Architectures Based on Multiple-input Floating Gate Transistors,” Ramírez-Angulo, V. Quintana, S.C.Choi, Proc. of 1996 World Automation Congress, Montpellier, France, May 27-30, 1996, pp. 539-544.

 

  1. “Design and implementation of VLSI Voltage Mode Adaptive filters,” Diaz-Sánchez and J. Ramírez-Angulo, 1996, Midwest Symposium on Circuits and Systems,Ames Iowa, August 11-13, 1996

 

  1. “A novel Slew-Rate Enhancement Technique for One Stage Operational Amplifiers,” Ramírez-Angulo, Midwest Symposium on Circuits and Systems, Ames Iowa, Aug. 11-13 1996

 

  1. “High Speed Digital VLSI Fuzzifier,” Ramírez-Angulo, J. Zrilic, A. Beltran, Midwest Symposium on Circuits and Systems, August 11-13, Ames Iowa, 1996

 

  1. “A Compact High Frequency Differential Analog Adder,” Diaz-Sánchez and J. Ramírez-Angulo, Midwest Symposium on Circuits and Systems, Ames Iowa, August 11-13 1996

 

  1. “Ultracompact Low-voltage Analog CMOS Multiplier Using Multiple Input Floating Gate Transistors, J. Ramírez-Angulo, 1996 European Solid State Circuits Conference, pp. 99-103.

 

  1. “Fast Sample Data Wavelet Transform CMOS VLSI implementation,” Gonzalez-Altamirano, A. Diaz-Sánchez and J. Ramírez-Angulo, Midwest Symposium on Circuits and Systems, Ames Iowa, August 11-13 1996

 

  1. “A new Universal Analog Fuzzifier Based on Operational Transconductance Multiplier,” P. Saavedra, J. Ramírez-Angulo and J. Zrilic, NASA URC Technical Conference on Education Space, Autonomy, Earth and Environment, Feb. 16-19, 1997

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  1. “Various Hardware Implementations of Membership function generators,” P. Saavedra, D.G. Zrilic, J. Ramírez-Angulo and B. Yuan, NASA URC Technical Conference on Education Space, Autonmy, Earth and Environment, Feb. 16-19, 1997, pp. 849-855

 

  1. “Hardware Implementation of Memebership Function Look-up table Approach,” T. Peterson, D. Zrilic and J. Ramírez-Angulo, B. Yuan NASA URC Technical Conference on Education Space, Autonmy, Earth and Environment, Feb. 16-19, 1997, pp. 579-580

 

  1. “Piecewise linear membership function generator- Divider Approach,” R. Hart, G. Martinez, B. Yuan, D. Zrilic and J. Ramírez-Angulo, NASA URC Technical Conference on Education Space, Autonmy, Earth and Environment, Feb. 16-19, 1997, pp. 325-330

 

  1. “Modeling Multiple-Input Floating Gate Transistors for Analog Signal Processing,” J. Ramírez-Angulo, G. Gonzalez-Altamirano and S.C. Choi, IEEE International Symposium on Circuits and Systems, Hong Kong, June 9-12 1997.

 

  1. “A Novel Sample-Data Adaptive Filter,” A. Diaz-Sánchez and J. Ramírez-Angulo, IEEE International Symposium on Circuits and Systems, Hong Kong, June 9-12 1997.

 

  1. “A Current-Mode Continuous Time Adaptive Filter,” A. Diaz-Sánchez and J. Ramírez-Angulo, 40th Midwest Symposium on Circuits and Systems, Santa Barbara, CA, August 3-6, 1997.

 

  1. “New Analog Current-mode/Voltage-Mode Fuzzifier with Continuously Adjustable Parameters,” J. Ramírez-Angulo, Jorge Zrilic, Patricias Saavedra and Antonio Lopez, 40th Midwest Symposium on Circuits and Systems, Santa Barbara, CA, August 3-6, 1997.

 

  1. “A new Programmable Logic Family Using Multiple-Input Floating Gate Transistors,” J. Ramírez-Angulo and G. Gonzalez-Altamirano, 40th Midwest Symposium on Circuits and Systems, Santa Barbara, CA, August 3-6, 1997, pp. 354-357

 

  1. “A continuous-time Analog Median Filter,” Alejandro Diaz-Sánchez, J. Ramírez-Angulo and Antonio Lopez. IEEE-NSIP 97, McKinack Island, Michigan, Sept. 8-10, 1997

 

  1. “An analog Approximation to median filtering,” Alejandro Diaz-Sánchez, J. Ramírez-Angulo and Antonio Lopez, ELECTRO’97, pp. 111-114, Chihuahua, Mexico, October 27-31 !997, .

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  1. “A Current-mode continuous time adaptive filtering,” Alejandro Diaz-Sánchez, and J. Ramírez-Angulo, ELECTRO’97, pp. 106-110, Chihuahua, Mexico, October 27-31 1997.

 

  1. “Building Blocks of Linear and Nonlinear Circuits Based on Operational Transconductance Amplifiers,” Anthony Esquibel, Spyros Andreou and J. Ramírez-Angulo, Nasa URC Technical Conference 98, February 22-26, 1998, Hunstsville Alabama,

 

  1. “Novel Programmable Linear and Nonlinear Oscillator Architectures,” Catharine Rice and J. Ramírez-Angulo, Nasa URC Technical Conference 98, February 22-26, 1998, Hunstsville Alabama,pp. 618-622

 

  1. “An example of Mixed Processing of Delta Sigma Modulated Pulse Stream,” Catharine Rice and J. Ramírez-Angulo, Nasa URC Technical Conference 98, February 22-26, 1998, Hunstsville Alabama,

 

  1. “Low Voltage Analog Modular expandable VLSI fuzzy inference engine, J. Ramírez-Angulo and J. Zrilic, World Automation Conference 98, May 10-14 98 Anchorage, Alaska, pp. 815-821.

 

  1. “Feedforward Robust Fuzzy Control, D. Zrilic, E. Kosmatopoulus and J. Ramírez, WAC’98 Anchorage Alaska, May 98, pp. 213-218.

 

  1. “High Performance Cell for Solving Real Time Field Problems Using the Resistive Grid Method,” N.C. Carneiro and J. Ramírez-Angulo, 1998 IEEE International Conference on Circuits and Systems, May 31 – June 3, 1998, Monterrey, CA.

 

  1. “Analog Building  Blocks  for a Sampled Data Fast Wavelet Transform CMOS VLSI implementation,” G. Gonzalez-Altamirano and J. Ramírez-Angulo, 1998 IEEE International Conference on Circuits and Systems, May 31 – June 3, 1998, Monterrey, CA.

 

  1. ”An Adaptive Cell for Resistive Grid Applications,” N. Carneiro and J. Ramírez-Angulo, Second International Workshop on Design of Mixed-Mode Integrated Circuits and Systems, Guanajuato Mexico, July 27-29 1998

 

  1. “A High Speed Analog Median Filter in CMOS Technology,” A. Diaz-Sánchez, J. Ramírez-Angulo, A. Lopez and E. Sánchez-Sinencio, IEE-ICECS´98, September 7-10 1998, Lisboa Portugal pp. 381-384.

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  1. “A low power analog median filter,” A. Diaz-Sánchez and J. Ramírez-Angulo, IEEE Second International Workshop on Design of Mixed Mode Integrated Circuits and Applications, Guanajuato, MX July 27-29, 1998, pp. 49-51

 

  1. “A Fuzzy Processor Based on Symmetric Triangular Membership Functions, “S.M. Abdel-Hafeez, S. Straks and J. Ramírez-Angulo, NASA-URCTC-98, Hunstville, Al, Feb. 98 pp. 618-622, pp. 237-242.

 

  1. “Novel Low Power and Constant gm operational amplifier using multiple-input floating-gate transistors,” S.C Choi and J. Ramírez-Angulo. IEEE Analog VLSI Workshop

 

  1. “Generador de Funciones de Pertenencia para Procesado Difuso adaptivo,” A. Lopez-Martin, J. Ramírez-Angulo and A. Carlosena SAAEI98, Pamplona, Spain, September 16-18 1998.

 

  1. “Compact Low-Voltage Analog Defuzzifier Using Multiple-Input Floating-Gate Transistors, “ J. Ramírez-Angulo, S.C. Choi and D. Zrilic, Proceedings DCIS’98 Madrid November 17-20 1998, pp. 332-337.

 

  1. “Linear Amplifiers with very high Gain-Bandwidth Product, “ J. Ramírez-Angulo.1999 IEEE International Symposium on Circuits and Systems, Orlando Fl, May 30-June 2, pp. II-620-623

 

  1. “CMOS op-amps for a single supply close to a threshold voltage and with almost rail-to-rail signal swing, “ J. Ramírez-Angulo, A Torralba, R.G. Carvajal and J.Tombs 1999 IEEE International Symposium on Circuits and Systems, Orlando Fl, May 30-June 2, 99, pp. II-408-411.

 

  1. “A comparison of architectures for a programmable fuzzy chip, “ T. Lund,A.Torralba, R.G. Carvajal and J .Ramírez-Angulo 1999 IEEE Internationa Symposium on Circuits and Systems, Orlando Fl, May 30-June 2, 99, pp. V-623-626.

 

  1. D/A Conversion Based on Multiple Input Floating Gate MOST, A.J. Lopez-Martin, J. Ramírez-Angulo and a. Carlosena, Proceedings, Midwest Symposium On Circuits and Systems, August 8-11, 1999, Las Cruces, NM, pp. 149-152.

 

  1. “An adaptive Cell for resistive grid applications, “ N. Carneiro and Ramírez-Angulo, Proceedings, Midwest Symposium On Circuits and Systems, August 8-11, 1999, Las Cruces, NM, pp. 304-308.

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  1. “A Compact Mixed-mode Block Fuzzifier, “ P. Saavedra, Ramírez-Angulo and J. Zrilic,  Proceedings, Midwest Symposium On Circuits and Systems, August 8-11, 1999, Las Cruces, NM, pp. 494-496.

 

  1. “A tunable low-voltage Transconductor and its application to HF Gm-C Filter Design,” F. Munoz, R.G. Carvajal and J. Ramírez-Angulo, Proceedings, Midwest Symposium On Circuits and Systems, August 8-11, 1999, Las Cruces, NM, pp. 826-829.

 

  1. “Versatile CMOS and BiCMOS Linear Transconductor Circuits,” A. Lopez-Martin, J. Ramírez-Angulo and A. Carlosena, Proceedings, Midwest Symposium On Circuits and Systems, August 8-11, 1999, Las Cruces, NM, pp. 1024-1027.

 

  1. “D/A Conversion Based on Multiple Input Floating Gate MOST, “ A.J. Lopez-Martin, J. Ramírez-Angulo and a. Carlosena, Proceedings, Midwest Symposium On Circuits and Systems, August 8-11, 1999, Las Cruces, NM, pp. 149-152

 

  1. “Architectures for a programmable fuzzy logic chip. A case study”. T-Lund, A.Torralba, R.G.Carvajal, J.Ramírez-Angulo. of the XIV Design of Circuits and Integrated Systems Conference, DCIS’99, Palma de Mallorca (Spain), Nov. 16-19, 1999 pp.473-476.

 

  1. “Two novel low voltage transconductors for VHF applications”. F.Muñoz, A.Torralba, R.G.Carvajal, J.Ramírez-Angulo, of the XIV Design of Circuits and Integrated Systems Conference, DCIS’99, Palma de Mallorca, (Spain) Nov. 16-19 1999, 533-537.

 

  1. “Integration of multiple-input floating-gate transistors into a top-down CAD design flow,” J.Tombs, J.Ramírez-Angulo, R.G.Carvajal, A.Torralba, of the XIV Design of Circuits and Integrated Systems Conference, DCIS’99, (Spain) Palma de Mallorca, Nov. 16-19 1999, pp. 767-771

 

  1. “VHF Tunable CMOS Low-Voltage Linear Transconductor and its application to HF Gm-C filter design,” F.Muñoz, A.Torralba, R.G.Carvajal, J.Ramírez-Angulo, of the XIV Design of Circuits and Integrated Systems Conference, DCIS’99, Palma de Mallorca, (Spain) Nov. 16-19 1999, 451-454.

 

  1. “Compact Low Voltage Analog Defuzzifers Using Multiple Input Floating Gate Transistors, J. Ramírez-Angulo, S.C. Choi, and J. Zrilic,” 2000 World Automation Conference, June 11-16, 2000, Maui, Hawai, pp. ISCCI-9963.

 

  1. “Two new VHF tunable CMOS Low-Voltage Linear Transconductor and its Application to HF gm-C filter Design,” F. Munoz, A. Torralba, J. Toms, and J. Ramírez-Angulo, IEEE International Symposium on Circuits and Systems (ISCAS) 2000, May 28-31, Geneve, Switzerland, pp. V-173-176

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  1. “Floating Gate Based Tunable Low-Voltage Linear Transconductor and its application to HF,”. Munoz, A. Torralba, J. Toms, and J. Ramírez-Angulo, IEEE International Symposium on Circuits and Systems (ISCAS) 2000, May 28-31, Geneve, Switzerland, pp. IV-465-468.

 

  1. “High Speed High Precision Voltage Mode MIN/MAX Circuits in CMOS Technology, ” R.G. Carvajal, J. Ramírez-Angulo and J. Tombs, IEEE International Symposium on Circuits and Systems (ISCAS) 2000 , May 28-31, Geneve, Switzerland, pp. V-13-16.

 

  1. “A 1.5V linear transconductor with wide bandwidth ands wide input and output signal swings,” Ramírez-Angulo, R.G. Carvajal,  A. Torralba and j. Martinez-Heredia, IEEE International Symposium on Circuits and Systems (ISCAS) 2000, May 28-31, Geneve, Switzerland, pp. V-161-164

 

  1. “A Fully Parallel CMOS Analog Median Filter, ” A. Diaz-Sánchez, J. Ramírez-Angulo, A. Lopez and E. Sánchez-Sinencio,” IEEE International Symposium on Circuits and Systems (ISCAS) 2000, May 28-31, Geneve, Switzerland, pp. II-593-596.

 

  1. “1.4V Supply, wide swing, high frequency CMOS Analogue multiplier with high current efficiency,” Ramírez-Angulo, R.G. Carvajal, and . J. Martinez-Heredia, IEEE International Symposium on Circuits and Systems (ISCAS) 2000, May 28-31, Geneve, Switzerland, pp. V-533-536.

 

  1. “Very Low-Voltage Class AB CMOS and Bipolar Precision Current rectifiers,” J. Ramírez-Angulo,” R.G. Carvajal, J. Tombs and A. Torralba, IEEE International Symposium on Circuits and Systems (ISCAS) 2000, May 28-31, Geneve, Switzerland, pp. III-5-9.

 

  1. “Modular Expandable Analog Defuzzifers Using Multiple Input Floating Gate Transistors,” J. Ramírez-Angulo, C. Choi, and J. Zrilic, IEEE International Symposium on Circuits and Systems (ISCAS) 2000, May 28- 31, Geneve, Switzerland, pp. V-381-384.

 

  1. “An Analog Median Filter for Low Power Applications,” Diaz-Sánchez and J. Ramírez-Angulo, IEEE 43drd Midwest Symposium on Circuits and Systems. Lansing, MI, August 8-11, 2000, session WA6.

 

  1. “Analog VLSI Weighted Median Filters,” Diaz-Sánchez and J. Ramírez-Angulo, IEEE 43drd Midwest Symposium on Circuits and Systems. Lansing, MI, August 8-11, 2000, session WA6

 

  1. “Low Voltage High Performance CMOS Current Mirrors,” Ramírez-Angulo, R.G. Carvajal and A. Torralba, IEEE 43drd Midwest Symposium on Circuits and Systems. Lansing, MI, August 8-11, 2000, Session WA6.

 

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  1. “Low supply voltage high performance CMOS current mirror with low input and output voltage requirements, ” Ramírez-Angulo, R.G. Carvajal and A. Torralba, IEEE DCIS’2000 Design of Circuits and Integrated Systems  2000,  Montpelier, France, November 22-24th, ,2000.

 

  1. “ A four quadrant 1.4V supply, wide swing, high frequency CMOS analogue multiplier with high current efficiency, ” Ramírez-Angulo, R.G. Carvajal, A. Torralba and J. Martinez-Heredia. IEEE DCIS’2000 Design of Circuits and Integrated Systems  2000,  Montpelier, France, November 22-24th, ,2000.

 

  1. “ A 1.1V Low-Power Sigma-Delta Modulator for 14b, 16KHz A/D conversion, ” Munoz, A.P. Vega-Leal,  R.G. Carvajal, A. Torralba and J. Ramirez-Angulo. IEEE DCIS’2000 Design of Circuits and Integrated Systems  2000,  Montpelier, France, November 22-24th, ,2000.

 

  1. “ Low Voltage class AB output stages for CMOS op-amps using floating gate capacitors, ” G. Carvajal, A. Torralba and J. Ramirez-Angulo, J. tombs and F. Munoz. IEEE DCIS’2000 Design of Circuits and Integrated Systems  2000,  Montpelier, France, November 22-24th, ,2000

 

  1. “ Class AB output stages for low-voltage CMOS op-amps with accurate quiescent current control by means of dynamic biasing, ” Torralba, R.G. Carvajal, J. Ramirez-Angulo, J. Martinez-Heredia and A.P. Vega-Leal. IEEE DCIS’2000 Design of Circuits and Integrated Systems  2000,  Montpelier, France, November 22-24th, ,2000

 

  1. “ High Speed Compact CMOS Circuits for continuous-time linear weighted voltage addition, ” Ramírez-Angulo. IEEE DCIS’2000 Design of Circuits and Integrated Systems  2000,  Montpelier, France, November 22-24th, ,2000.

 

  1. “Low Voltage Continuous Time Tunable High Frequency Filters Based on Floating Gates and Dynamic Biasing Techniques,” F. Munoz, A. Torralba, J. Toms, J. Ramirez-Angulo, 2001 Southwest Symposium on Mixed-Signal Design Austin, TX February 25-27, 2001

 

  1. “Compact CMOS Circuits for High Speed continuous-time linear weighted voltage addition,” Jaime Ramirez-Angulo and Francisco Ledesma, IEEE International Symposium on Circuits and Systems, May 6-9, 2001 Sidney Australia, pp. I-707-I-710.

 

  1. “A new Class AB differential Input stage for implementation of low voltage high slew rate op-amps and linear transconductors,” Ramirez-Angulo, R. Gonzalez-Carvajal, A. Torralba and Carlos Nieva, IEEE International Symposium on Circuits an Systems, May 6-9,  2001 Sidney Australia, pp. I-671-I-674.

 

  1. “A 1.1V Low-Power sigma-delta Modulator for 14-b 16KHz A/D Conversion,” Munoz, A.P. VegaLeal,  R. G. Carvajal, A. Torralba, J. Tombs and J. Ramírez-Angulo,  IEEE International Symposium on Circuits an Systems, May 6-9, 2001 Sidney Australia, I-619-I-622

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  1. “Low voltage class AB output stages for CMOS op-amps using floating capacitors,” G. Carvajal, A. Torralba, J. Tombs and J. Ramírez-Angulo, F. Munoz,  IEEE International Symposium on Circuits an Systems, May 6-9, 2001, Sidney Australia, I-13-I-16.

 

  1. “Some techniques for low-voltage operation of continuous-time analog CMOS circuits,” Jaime Ramirez-Angulo, 2nd Dallas IEEE Workshop on Low-Voltage Mixed-signal Circuits and systems, March 26th 2001, Dallas, TX

 

  1. “Innovative Built-In Self-Test Schemes for On-Chip Diagnosis, Compliant with the IEEE 1149.4 Mixed-Signal Test Bus Standard: Time to Market-Reduction,” Gladys Omayra Ducoudray Acevedo, Jaime Ramirez-Angulo Proceedings of the Third IEEE International Conference on Devices, Circuits and Systems (ICCDCS) , February 11-12, 2001 Cancun, Mexico, pp. 131-134

 

  1. “An analog median filter with Feedforward adaptation. “ Alejandro Díaz-Sánchez  and Jaime Ramírez-Angulo, 45th Midwest Symposium on Circuits and Systems, Dayton, Ohio, August 14-17 2001

 

  1. “Built In self test Scheme for on-Chip Diagnosis compliant with IEEE 1149.4 Mixed-signal test bus standard,” O.  Ducoudray-Acevedo and Jaime Ramirez-Angulo, SAAEI’01, Matanzas Cuba 17-19 Sept. 2001, SP2-IV

 

  1. “Effect of restrained neighborhood in analog median filters” A. Diaz-Sanchez and Jaime Ramirez-Angulo, SAAEI’01, Matanzas Cuba 17-19 September 2001

 

  1. “New Architectures of class AB operational amplifiers for low-voltage low-power applications,” Jaime Ramirez-Angulo1,, Ramon Gonzalez-Carvajal2, Antonio Torralba2 and C. Nieva, SAAEI’01, Matanzas Cuba 17-19 Sept. 2001

 

  1. “Analog Adaptive Median Filters for Impulse Noise Removal,”Alejandro Díaz-Sánchez, Jaime Ramírez-Angulo, Electro 2001, pp. 287-290, October 22-26, 2001 Chihuahua, Mexico.

 

  1. Class AB output stages for low voltage CMOS op-amps with accurate quiescent current control by means of dynamic biasing” Torralba A, Carvajal RG, Ramirez-Angulo, 8th IEEE International Conference on Electronics, Circuits and Systems, Sept. 2-5, 2001 St. Julians, Malta ICECS 2001. pp: 967-970.

 

  1. “Behavior Analysis and Testing of Resistive Opens in the clock Circuitry of Memory Elements, “ Antonio Zenteno, Victor Champac and Jaime Ramirez-Angulo Proceedings of 3rd Latin American Test Workshop, Montevideo, Uruguay, February 10-13th, 2002

 

  1. Gladys Omayra Ducoudray Acevedo, Jaime Ramirez-Angulo, “ VDDQ: A Buitl In Selft-test Scheme for Analog On-chip Diagnosis Compliant with the IEEE with the 1149.4 Mixed-Signal Test Bus Standard.,“ Fourth IEEE International Caracas Conference on Devices, Circuits and Systems, Aruba, April 17-19, 2002, pp. 1026-1 1026-4

 

  1. ”A 1.1V Very Low-Power SD Modulator For 14-b 16KHz A/D Conversion Using A Novel Class AB Transconductance Amplifier,”. Galan , A. P. VegaLeal1, F. Muñoz1, R. G. Carvajal 1, A. Torralba 1, J. Tombs1 and  J. Ramírez-Angulo, 2002 IEEE International Symposium on Circuits and Systems, May 26-29, 2002, Scottsdale, AZ pp. II-616-II-619

 

  1. “Comparison of two Schemes for Continuous-time sub-volt Op-amp Operation,” Jaime Ramirez-Angulo, Antonio Torralba and Ramon Gonzalez-Carvajal, 2002 IEEE International Symposium on Circuits and Systems, May 26-29, 2002, Scotttsdale, AZ. pp.I-305 I-308

 

 

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  1. “The Multiple Input Linear Weighted Differential Amplifier: a New Versatile Analog Circuit Building Block ,” Jaime Ramirez-Angulo and Francisco Ledesma, 2002 IEEE International Symposium on Circuits and Systems, May 26-29, 2002, Scottsdale, AZ, pp. III-747-750

 

  1. “Low-Power Low-Voltage Class-AB Linear OTA For HF Filters With A Large Tuning Range,” J.A.Galán2, R.G. Carvajal1, F.Muñoz1, A.Torralba1, J.Ramírez-Angulo, 2002 IEEE International Symposium on Circuits and Systems, May 26-29, 2002, Scottsdale, AZ pp. II-9-II-12

 

  1. “The Flipped Voltage Follower: A useful cell for low-voltage low-power circuit design.” Ramírez-Angulo2, R.G.Carvajal1,, A.Torralba1, J. Galan1, A. P. Vega-Leal1, and J. Tombs, 2002 IEEE International Symposium on Circuits and Systems, May 26-29, 2002, Scottsdale, A, pp. II-615-II618

 

  1. A Simple technique to significantly enhance slew rate and bandwidth of one-Stage cmos operational amplifiers,” Jaime Ramirez-Angulo and Michael Holmes, 2002 IEEE International Symposium on Circuits and Systems, May 26-29, 2002, Scottsdale, A. pp. II-II-835-II-838.

 

  1. “Innovative Built-in self-test Scheme for on-chip Diagnosis, Compliant With the IEEE 1149.4 Mixed-signal Test Bus Standard, “ Gladys Omayra Ducoudray Acevedo , Jaime Ramirez-Angulo, , 2002 IEEE International Symposium on Circuits and Systems, May 26-29, 2002, Scottsdale, Az., pp. I-148-I-152

 

  1. Compact Continuous-time analog rank-order Filter Implementation in CMOS technology,” Jaime Ramírez-Angulo, Chad Lackey and Alejandro Díaz-Sanchez,, 2002 IEEE International Symposium on Circuits and Systems, May 26-29, 2002, Scottsdale, Az, pp. V-65-V-68

 

  1. Low-power low-voltage analog electronic circuits using the flipped voltage follower, .” Ramírez-Angulo2, R.G.Carvajal1,, A.Torralba1, J. Galan1, A. P. Vega-Leal1, and J. Tombs,  2002 International Symposium on Industrial Electronics, L’Aquila, Italy July 8-11, 2002.

 

  1. “Comparison of New and Conventional Low Voltage Current Mirrors, “ F. Ledesma, J. Ramirez-Angulo and R, 2002 IEEE Midwest Symposium on Circuits and Systems, Tulsa, OK, Aug. 4-7 2002, pp. II-49-52

 

  1. “A new Family of low voltage circuits based on quasi-floating gate transistors, “ C. Urquidi J. Ramirez-Angulo , 2002 IEEE Midwest Symposium on Circuits and Systems, Tulsa, OK, Aug. 4-7 2002, pp. I-93-96

 

  1. “On-chip iDD pulse response method using a high speed dynamic current sensor, “ G Omaira Ducoudray and Ramirez-Angulo, 2002 IEEE Midwest Symposium on Circuits and Systems, Tulsa, OK, Aug. 4-7 2002.pp. II-282-285.

 

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  1. “New Architectures of Class AB CMOS and BiCMOS operational amplifier using local common mode feedback, “ M. Holmes,  Ramirez-Angulo and R, 2002 IEEE Midwest Symposium on Circuits and Systems, Tulsa, OK, Aug. 4-7 2002

 

  1. “Class-AB Linear OTA For Low-Power Low-Voltage HF Filters With A Large Tuning Range,” Juan Antonio Gomez Galan, Ramon Gonzalez Carvajal, Fernando Muñoz Chavero, Antonio Torralba , DCIS 2002 Nov. 19-22, Santander, Spain,

 

  1. “Low voltage Class-AB Output Stages for CMOS Op-Amps,” R. Carvajal, A. Torralba, J. Ramirez-Angulo, J. Tombs, F. Muñoz, ESSCIRC’02, September 24-26, Florence, Italy

 

  1. “A New Compact Low-Power High Slew Sate Class AB CMOS Buffer, “Torralba, R.G.Carvajal, J. Galán, and J.Ramírez-Angulo, ISCAS 2003, May 25-28, Bangkok, Thailand

 

  1. “A Low-Power Low-Voltage OTA-C Sinusoidal Oscillator with more than two decades of Linear Tuning Range, “ J.Galán, R.G. Carvajal1, F.Muñoz, A.Torralba, J.Ramírez-Angulo ISCAS 2003, May 25-28, Bangkok, Thailand

 

  1. “New output stage for low supply voltage, high-performance CMOS current mirrors, “ Torralb1, R.G. Carvajal, F. Muñoz and J. Ramírez-Angulo, ISCAS 2003, May 25-28, Bangkok, Thailand

 

  1. “New low-power low-voltage differential class-AB OTA for SC circuits,” Carvajal, J. Galán, J. Ramírez-Angulo and A. Torralba, ISCAS 2003, May 25-28, Bangkok, Thailand

 

  1. “Sub-volt supply analog circuits based on quasi-floating gate transistors,” Jaime Ramirez-Angulo, Carlos Urquidi, Ramon Gonzalez-Carvajal and Antonio Torralba ISCAS 2003, May 25-28, Bangkok, Thailand

 

  1. “Low-Voltage Closed-Loop Amplifier Circuits Based on Quasi-Floating Gate Transistors,” Jaime Ramirez-Angulo, Antonio J. Lopez-Martin and Ramon G. Carvajal, ISCAS 2003, May 25-28, Bangkok, Thailand

 

  1. “Low Voltage Low-Power Wideband CMOS Current Conveyors Based on The Flipped Voltage Follower,” Antonio J. Lopez-Martin, Jaime Ramirez-Angulo, and Ramon G. Carvajal, ISCAS 2003, May 25-28, Bangkok, Thailand

 

  1. “A Novel Design Technique for Very Low-Voltage MOS Translinear Circuits,” Antonio J. Lopez-Martin, Alfonso Carlosena and Jaime Ramirez-Angulo, ISCAS 2003, May 25-28, Bangkok, Thailand

 

  1. “New Very Compact Continuous-Time Low-Voltage Analog Rank-Order Filter Architecture, “ Jaime Ramírez-Angulo1 , R. Gonzalez-Carvajal and Gladys Omayra Ducoudray , ISCAS 2003, May 25-28, Bangkok, Thailand

 

  1. “Extremely Low Supply Voltage Circuits Based on Quasi-Floating Gate Supply Voltage Boosting”, Fernando Munoz, Antonio Lopez-Martin, Ramon G. Carvajal, Jaime Ramirez-Angulo, A.Torralba, Meghraj Kachare and B. Palomo , , ISCAS 2003, May 25-28, Bangkok, Thailand

 

  1. “A New 1.5V Linear Transconductor with High Output Impedance in a Large Bandwidth,” A.Torralba, J. Martmnez-Heredia, R.G.Carvajal and J.Ramirez-Angulo, , ISCAS 2003, May 25-28, Bangkok, Thailand

 

  1. “A high-speed Dynamic Current Sensor for iDD Test Based on the Flipped Voltage Follower, “ Gladys Omayra Ducoudray, Ramon González-Carvajal, Jaime Ramírez-Angulo, SSMSD February 23-25 2003, Las Vegas, Nevada

 

  1. A New Power Efficient Fully Differential Low Voltage Two Stage Op-Amp Architecture ,” J. Ramírez-Angulo S. Thoutam G.O. Ducoudray and R.G. Carvajal, Proceedings of the VLSI’03 conference : June 23-26, 2003, pp. 87-91, Las Vegas, Nevada, USA.

 

  1. “Highly Linear Wide Input Range CMOS OTA Architectures Operating in Subthreshold and Strong Inversion,”  Ramirez-Angulo, C. Durbha, G. O. Ducoudray-Acevedo and R. G. Carvajal, VLSI’03: June 23-26, 2003,pp. 345-350,  Las Vegas, Nevada, USA.

 

  1. “Low Voltage Wide gm Adjustment Range Highly Linear BiCMOS OTA,” Ramírez-Angulo , C. Durbha, G. O. Ducoudray-Acevedo and R.G. Carvajal  11th Annual NASA Symposium on VLSI Design , Coeur d’Alene Idaho May 28-29, 2003

 

  1. “A 1.5V, 8-BIT, 10MS/S CMOS Pipeline Analog-to-Digital Converter”. B. Palomo, F. Muñoz, R.G. Carvajal, A. Torralba and J. Ramírez-Angulo, XVIII Conference on Design of Circuits and Integrated Systems DCIS 2003, November 18-21, 2003, Ciudad Real, Spain

 

  1. “New low-voltage high-gain differential OTA for SC circuits” R.G. Carvajal, B. Palomo, A. Torralba, F. Muñoz and J. Ramírez-Angulo, XVIII Conference on Design of Circuits and Integrated Systems DCIS 2003, November 18-21, 2003, Ciudad Real, Spain.

 

  1. “A Simple Alternative to Switched-Op-amps or Voltage Doublers For Very Low Voltage SC Circuits”. F. Muñoz, J. Ramírez-Angulo, A. Lopez-Martin , R.G. Carvajal, A.Torralba and B. Palomo, XVIII Conference on Design of Circuits and Integrated Systems DCIS 2003, November 18-21, 2003, Ciudad Real, Spain

 

  1. “New low-power low-voltage differential class-AB OTAs for SC circuits”. Ramon Carvajal, Juan Galan, Jaime Ramirez-Angulo, Antonio Torralba and Bernardo Palomo, XVIII Conference on Design of Circuits and Integrated Systems DCIS 2003, November 18-21, 2003, Ciudad Real, Spain

 

  1. “A Novel Technique for Very Low Voltage Rail-to-Rail CMOS Track-and-Hold Circuits”. Jaime Ramirez-Angulo,Antonio J. López-Martín, Ramón G. Carvajal and Chad Lackey, XVIII Conference on Design of Circuits and Integrated Systems DCIS 2003, November 18-21, 2003, Ciudad Real, Spain

 

  1. “Low-voltage CMOS four quadrant multipliers based on Flipped voltage followers”. Jaime Ramirez-Angulo, Shanta Thoutam, Antonio Lopez-Martin and Ramon G. Carvajal, XVIII Conference on Design of Circuits and Integrated Systems DCIS 2003, November 18-21, 2003, Ciudad Real, Spain

 

  1. “A Low-Voltage Wide Tuning Range gm-C VCO Using A Class-AB Linear OTA”. Juan Galan,Ramom G. Carvajal, Fernando Muñoz, Antonio Torralba, Jaime Ramirez-Angulo and  Marta Laguna, XVIII Conference on Design of Circuits and Integrated Systems DCIS 2003, November 18-21, 2003, Ciudad Real, Spain.

 

  1. “A New Compact Low-Power High Slew-Rate Class AB CMOS Buffer”. Antonio Torralba, Ramon Carvajal, Juan Galan, Jaime Ramirez-Angulo and Marta Laguna, XVIII Conference on Design of Circuits and Integrated Systems DCIS 2003, November 18-21, 2003, Ciudad Real, Spain

 

  1. “MOS and bipolar translinear cells and applications for implementation of low distortion OTAs”. Jaime Ramirez-Angulo, Chandrika Durbha, Gladys Omayra Ducoudray, Ramon G. Carvajaland Meghraj Kachare, XVIII Conference on Design of Circuits and Integrated Systems DCIS 2003, November 18-21, 2003, Ciudad Real, Spain

 

  1. “Resistorless and capacitorless schemes for continuous-time linear weighted voltage addition using multiple input fully differential operational amplifiers”. Francisco Ledesma and Jaime Ramirez-Angulo, XVIII Conference on Design of Circuits and Integrated Systems DCIS 2003, November 18-21, 2003, Ciudad Real, Spain.

 

  1. “Very Low Voltage Analog Signal Processing Based on the MOS Translinear Principle”. Carlos A. De La Cruz Blas, Sara Gallego, Antonio J. López-Martín, Alfonso Carlosena and Jaime Ramirez-Angulo, XVIII Conference on Design of Circuits and Integrated Systems DCIS 2003, November 18-21, 2003, Ciudad Real, Spain

 

  1. “A fully differential, 1.5V supply, high linearity, large bandwidth transconductor with high output impedance “. Juana Martínez-Heredia, Antonio Torralba, Ramón Carvajal and Jaime Ramírez-Angulo, XVIII Conference on Design of Circuits and Integrated Systems DCIS 2003, November 18-21, 2003, Ciudad Real, Spain

 

  1. 5V Rail-to-Rail Programmable-Gain CMOS Amplifier, “ Jaime Ramírez-Angulo 1, Antonio J. López-Martín , Ramón G. Carvajal, and Chad Lackey, ESSCIRC ’03. 16-18 Sept., 2003, Estoril, Lisboa Pages:373 – 376.

 

  1. “Techniques for very low-voltage operation of continuous-time analog CMOS circuits,” J. Ramirez-Angulo, R. Gonzalez-Carvajal, A. Lopez-Martin, Proceedings 17th International Conference on VLSI Design, 2004. 5-9 Jan. 2004 Pages:39 – 44

 

  1. “A novel serial multiplier using floating-gate transistors, “Luis F. Cisneros-Sinencio, Alejandro Diaz-Sanchez, Jaime Ramirez-Angulo, 2004 IEEE International Symposium on Circuits and Systems, May 23-26 2004, Vancouver, Canada pp. I-861-864

 

  1. “Novel Architectures of Class AB CMOS current mirrors with programmable gain, Chandrika Durbha, Jaime Ramírez-Angulo, Antonio Lopez-Martin and Ramon Gonzalez-Carvajal., , 2004 IEEE International Symposium on Circuits and Systems, May 23-26 2004, Vancouver, Canada , pp. IV-760-763.

 

  1. “Power Efficient Fully Differential Low-Voltage Two stage Class AB/AB op-amp architectures,”, Shanta Thoutam, Jaime Ramírez-Angulo, Antonio Lopez-Martin and Ramon Gonzalez-Carvajal., , 2004 IEEE International Symposium on Circuits and Systems, May 23-26 2004, Vancouver, Canada pp. I-733-736

 

  1. “Highly Linear Wide tuning range CMOS transconductor operating in moderate inversion,”, Chandrika Durbha, Jaime Ramírez-Angulo, Antonio Lopez-Martin and Ramon Gonzalez-Carvajal., , 2004 IEEE International Symposium on Circuits and Systems, May 23-26 2004, Vancouver, Canada, I-805-808.

 

  1. “A novel family of Low-voltage very low power super class AB OTAs with significantly enhanced slew rate and Bandwidth,”, Sushmita Baswa, Jaime Ramírez-Angulo, Antonio Lopez-Martin and Ramon Gonzalez-Carvajal., , 2004 IEEE International Symposium on Circuits and Systems, May 23-26 2004, Vancouver, Canada, I-729-732.

 

  1. “Winner take-all class AB input stage : A novel concept for low-voltage power efficient class AB amplifiers,”, Sushmita Baswa, Jaime Ramírez-Angulo, Antonio Lopez-Martin and Ramon Gonzalez-Carvajal., , 2004 IEEE International Symposium on Circuits and Systems, May 23-26 2004, Vancouver, Canada, pp. I-1028-1031.

 

  1. “Compact tunable CMOS OTA with high linearity,”, Meghraj Kachare, Jaime Ramírez-Angulo, Antonio Lopez-Martin and Ramon Gonzalez-Carvajal., , 2004 IEEE International Symposium on Circuits and Systems, May 23-26 2004, Vancouver, Canada I-693-696.

 

  1. “A low-voltage rail-to-rail V-I conversion scheme for applications in current –mode a/D converters,”, Rahul Shukla, Jaime Ramírez-Angulo, Antonio Lopez-Martin and Ramon Gonzalez-Carvajal., , 2004 IEEE International Symposium on Circuits and Systems, May 23-26 2004, Vancouver, Canada I-916-919.

 

  1. “High Speed, High precision Analog Rank order filter in CMOS technology,”, Ramon Gonzalez Carvajal, Jaime Ramírez-Angulo, Gladyrs Omayra Ducoudray-Acevedo, and Antonio Lopez-Martin., 2004 IEEE International Symposium on Circuits and Systems, May 23-26 2004, Vancouver, Canada pp. I-793-796.

 

  1. “Low-voltage CMOS Analog Four quadrant multiplier based on flipped voltage followers,”, Jaime Ramírez-Angulo, Shanta Thoutam, Ramon Gonzalez-Carvajal.and Antonio Lopez-Martin, , 2004 IEEE International Symposium on Circuits and Systems, May 23-26 2004, Vancouver, Canada, I-681-684

 

  1. “A New Flip Flop Gate Based on Floating Gates,” L. F. Cisneros Sinencio, A. Diaz-Sanchez, J. Ramirez-Angulo, ICEEE and X CIE, Acapulco, Mexico, September 8-10, 2004, pp. 219-221.

 

  1. Baswa, M. Bikumandla , J. Ramírez-Angulo, A. J. López-Martín , R.G. Carvajal: “Low-Voltage Low-Power Super Class-AB CMOS OP-AMP with Rail-to-Rail Input/Output Swing.”, Fifth International Caracas Conference on Devices, Circuits and Systems, November 3-5 2004, Punta Cana, Dominican Republic

 

  1. Ramírez-Angulo, A.. J. López-Martín, R. G. Carvajal “New Low-Voltage Class AB/AB CMOS Op-amp with  rail-to-rail input/output swing ,” Shanta Thoutam, Milind-Subhash Sawant, XIX Conference on Design of Circuits and Integrated Systems, Bordeaux, France, November 24-26, 2004

 

  1. Torralba, R.G.Carvajal, F.Muñoz, J. Ramírez-Angulo, New Low Voltage Class-AB CMOS Unity-Gain Buffer and Current Mirror, XIX Conference on Design of Circuits and Integrated Systems, Bordeaux, France, November 24-26, 2004

 

  1. Ramirez-Angulo, C. Durbha, A.J. López-Martín, and R. G. Carvajal ,”Tunable Gm-C Biquadratic Filter Operating in Moderate Inversion “XIX Conference on Design of Circuits and Integrated Systems, Bordeaux, France, November 24-26, 2004

 

  1. Ramírez-Angulo, A.. J. López-Martín, R. G. Carvajal,” Very Low-Voltage Class-AB CMOS Precision Current Rectifier and Current Mirror,” XIX Conference on Design of Circuits and Integrated Systems, Bordeaux, France, November 24-26, 2004

 

  1. Baswa, A. J. López-Martín, J. Ramirez-Angulo, and R. G. Carvajal,” A New Family of Low-Voltage Power-Efficient Class AB CMOS OTAs,” XIX Conference on Design of Circuits and Integrated Systems, Bordeaux, France, November 24-26, 2004

 

  1. J. López-Martín, J. Ramirez-Angulo, C. Durbha, and R. G. Carvajal, “Fully-Differential CMOS Current Conveyor Operating in Moderate Inversion,”, XIX Conference on Design of Circuits and Integrated Systems, Bordeaux, France, November 24-26, 2004.

 

  1. Rodiz-Obaya, J. J. Rodríguez-Andina, and J. Ramírez-Angulo “An accurate algorithm for transistor sizing in analog CMOS design ,”, XIX Conference on Design of Circuits and Integrated Systems, Bordeaux, France, November 24-26, 2004

 

  1. Power-Efficient Super Class AB OTAs,” Antonio J. López-Martín, Sushmita Baswa, Jaime Ramirez-Angulo, and Ramón G. Carvajal, ESSCIRC 2004, 21-23 September , 2004, Leuven, Belgien.

 

  1. “A Compact Micropower Class AB CMOS Sample and Hold Circuit,” Xabier Ugalde, Antonio J. Lopez-Martin, Carlos A. De La Cruz Blas, Alfonso Carlosena, Ramon G. Carvajal, Jaime Ramirez-Angulo, New Mexico State University, USA, XX Conference on Design of Circuits and Integrated Systems DCIS 2005, November 18-21, 2005, Lisboa, Portugal

 

  1. “Class-AB Low-Voltage CMOS Unity-Gain Buffers,” Mariano Jimenez,
    Antonio Torralba, University of Sevilla, S Ramon G. Carvajal, Jaime Ramirez-Angulo, XX Conference on Design of Circuits and Integrated Systems DCIS 2005, November 18-21, 2005, Lisboa, Portugal

 

  1. ”A Low-Voltage all Cascode High Performance CMOS Current Mirror and Applications,” Annajirao Garimella, Lalitha Garimella, Jaime Ramirez-Angulo, Ramon G. Carvajal, Antonio J. Lopez-Martin, XX Conference on Design of Circuits and Integrated Systems DCIS 2005, November 18-21, 2005, Lisboa, Portugal

 

  1. “Low-Power Super Class AB OTAs based on adaptive techniques,” Ramon G. Carvajal, Jaime Ramirez-Angulo, Antonio Lopez-Martin, Juan Galan, Carlos Rubia-Marcos, XX Conference on Design of Circuits and Integrated Systems DCIS 2005, November 18-21, 2005, Lisboa, Portugal .

 

  1. “CMOS Transconductor with 75-dB SFDR for Rail-to-Rail Input Swings,” Antonio J. Lopez-Martin, S Jaime Ramirez-Angulo, Ramon G. Carvajal, XX Conference on Design of Circuits and Integrated Systems DCIS 2005, November 18-21, 2005, Lisboa, Portugal

 

  1. “New Rail-to-Rail Input Stage With Reduced Supply Requirements,” Ivan Padilla, Jaime Ramirez-Angulo, Ramon G. Carvajal, Antonio Lopez-Martin. XX Conference on Design of Circuits and Integrated Systems DCIS 2005, November 18-21, 2005, Lisboa, Portugal .

 

  1. Jaime Ramirez-Angulo, Milind S. Sawant, Ramon G. Carvajal, Antonio Lopez-Martin, “MOS Resistor Linearization and Range Improvement Using Large Resistive Biasing Elements and Capacitive Voltage Averaging,” XX Conference on Design of Circuits and Integrated Systems DCIS 2005, November 18-21, 2005, Lisboa, Portugal

 

  1. Antonio J. Lopez-Martin, Jaime Ramirez-Angulo, Ramon G. Carvajal, “A 3-V 3-mW CMOS Transconductor with 75-dB SFDR for Rail-to-Rail Input Swings,” XX Conference on Design of Circuits and Integrated Systems DCIS 2005, November 18-21, 2005, Lisboa, Portugal .

 

  1. Francisco Rafael Trejo-Macotela, Alejandro Diaz-Sanchez, Jaime Ramirez-Angulo “Low Voltage Low Noise Amplifier for Radio Frequency Applications,”, 2005 IEEE Midwest Symposium on Circuits and Systems, Cincinnati, OH August 21-23 2005, pp. 639-642.

 

  1. Milind Subhash Sawant, Jaime Ramirez-Angulo, Ramon Carvajal, Antonio Lopez-Martin, “Wide gm Adjustment Range Highly Linear OTA with Programmable Mirrors” 2005 IEEE Midwest Symposium on Circuits and Systems, Cincinnati, OH August 21-23 2005.

 

  1. Milind Subhash Sawant, Jaime Ramirez-Angulo, Ramon Carvajal, Antonio Lopez-Martin,  “New Compact  Implementation of Very High Performance CMOS Current Mirrors,” 2005 IEEE Midwest Symposium on Circuits and Systems, Cincinnati, OH August 21-23 2005.

 

  1. Annajirao Garimella, Lalitha M Kalyani-Garimella, Randy Romero, Jaime Ramirez-Angulo, Ramon G. Carvajal and Antonio Lopez-Martin “New Compact and Versatile Wide Tuning Range CMOS Voltage Controlled Oscillator,”  ,2005  IEEE Midwest Symposium on Circuits and Systems, Cincinnati, OH August 21-23 2005.

 

  1. Ivan Padilla, Jaime Ramirez-Angulo, Ramon Carvajal, Antonio Lopez-Martin and Ramon G. “Low Voltage Rail-to-Rail Operational Amplifier Based on Flipped Voltage Followers, Carvajal, 2005 IEEE Midwest Symposium on Circuits and Systems, Cincinnati, OH August 21-23 2005.

 

  1. Lalitha M Kalyani-Garimella, Annajirao Garimella, Laura I. Escobedo, J. Ramirez-Angulo, Ramon G. Carvajal and Antonio Lopez-Martin, “Compact Low Voltage VHF Continuous Time Current Mode FLF Filter,” 2005 IEEE Midwest Symposium on Circuits and Systems, Cincinnati, OH August 21-23 2005.

 

  1. “Sheetal Gupta, Ivan Padilla, Jaime Ramirez-Angulo, Antonio Torralba and Mariano Jimenez,Comparison of Conventional and New Flipped Voltage Follower Structures,” 2005 IEEE Midwest Symposium on Circuits and Systems, Cincinnati, OH August 21-23 2005

 

  1. “Low Voltage VHF Current Modem Continuous Time  Filters using Floating gate Programmable Current Mirrors” Lalitha MK Garimella, Annajirao Garimella, Laura Escobedo[1], Jaime Ramírez-Angulo 9th-VDAT Symposium, August 10-13 2005, Bangalore India

 

  1. Milind Subhash Sawant, Jaime Ramirez-Angulo, Ramon Carvajal, Antonio Lopez-Martin, “Linear Compact CMOS OTA with Multidecade Adjustment Range, -62dB IM3, -75dB SFDR, Constant Input Range and Two Independent Degrees of Freedom for Gain Adjustment,” IEEE International Symposium on Circuits and Systems May 21-24 2006,  Kos, Greece.

 

  1. Jaime Ramirez-Angulo, Ramon Carvajal, Antonio Lopez-Martin, and Juan A. Galan, “A free but efficient class AB two-stage operational amplifier,” IEEE International Symposium on Circuits and Systems  May 21-24 2006, Kos.

 

  1. Ivan Padilla, Jaime Ramirez-Angulo, Ramon Carvajal, and Antonio Lopez-Martin, “Compact Implementation of Linear Weighted CMOS Transconductance Adder Based on the Flipped Voltage Follower,” IEEE International Symposium on Circuits and Systems,  May 21-24 2006, Kos, Greece.

 

  1. Jaime Ramirez-Angulo, Sheetal Gupta, Ramon Carvajal,  and Antonio Lopez-Martin“New Improved CMOS Class AB Buffers Based on Differential Flipped Voltage Followers, ” IEEE International Symposium on Circuits and Systems May 21-24 2006, Kos, Greece.

 

  1. Antonio Lopez-Martin, Jaime Ramirez-Angulo and Ramon Carvajal,“Rail-to-Rail Tunable CMOS V-I Converter,” IEEE International Symposium on Circuits and Systems May 21-24 2006, Kos, Greece.

 

  1. Mariano Jimenez, Antonio Torralba, Ramon Carvajal, and Jaime Ramirez-Angulo“A New Low-Voltage CMOS Unity-Gain Buffer,” IEEE International Symposium on Circuits and Systems May 21-24 2006, Kos, Greece.

 

  1. Jaime Ramirez-Angulo, Milind Subhash Sawant, Ramon Carvajal, Antonio Lopez-Martin, “New Compact and Power Efficient Dynamically Biased Cascode Mirrors and Telescopic Op-amps,” IEEE International Symposium on Circuits and Systems May 21-24 2006,  Kos, Greece.

 

  1. Lucia Acosta, Ramon G. Carvajal and Mariano Jiménez Jaime Ramirez-Angulo, and Antonio Lopez-Martin A CMOS Transconductor with 90 dB SFDR and Low Sensitivity to Mismatch,” IEEE International Symposium on Circuits and Systems May 21-24 2006, Kos, Greece.

 

  1. Kalyani-Garimella, A.Garimella, J. Ramirez-Angulo, R. Carvajal, A. Lopez-Martin, “Low-Voltage Universal Cell (LVUC): A Compact Analog/Digital Logic Block for Mixed Signal FPGAs,” 2006 Custom Integrated Circuits Conference,  September 10-13, San Jose, CA

 

  1. Ramirez-Angulo, A. Garimella, L. M. K.-Garimella,  R.G. Carvajal and A. Lopez-Martin, “Compact Novel Floating Gate Offset Compensation Scheme with Low Sensitivity to Charge Injection, Clock Feedthrough and Leakage,” 49th Midwest Symposium on Circuits and Systems, Mayaguez, Puerto Rico, August 6-9, 2006.

 

  1. Ramirez-Angulo, S. R. Sudha Garimella, A. López Martín, R. G. Carvajal “New Gain Programmable Current Mirrors Based on  Current Steering,” 49th Midwest Symposium on Circuits and Systems, Mayaguez, Puerto Rico, August 6-9, 2006.

 

  1. Calvo, S. Celma, M. T. Sanz, J. Ramirez-Angulo, “A Versatile Low-Voltage CMOS Pseudo-Differential Transconductor with improved linearity”, 49th Midwest Symposium on Circuits and Systems, Mayaguez, Puerto Rico, August 6-9, 2006.

 

  1. López-Morillo, R. G. Carvajal, H. Elgimili, J. Ramirez-Angulo, A. Lopez-Martin and E. Rodriguez-Villegas, “A Very Low-Power Class AB/AB Op-Amp Based Sigma-Delta Modulator for Biomedical application,” 49th Midwest Symposium on Circuits and Systems, Mayaguez, Puerto Rico, August 6-9, 2006.

 

  1. Kalyani-Garimella, A.Garimella, J. Ramirez-Angulo, R. Carvajal, A. Lopez-Martin,”Low-Voltage Universal Cell (LVUC): A Compact Analog/Digital Logic Block for Mixed Signal FPGAs,” 2006 IEEE Custom Integrated Circuits Conference, September 10 – 13, 2006, San Jose, California.

 

  1. Calvo, S. Celma, J. Ramirez-Angulo, M. T. Sanz, “Low-voltage VCM-independent Linearly Tunable CMOS Balanced Transconductor,”  DCIS 2006, Barcelona Spain, November 22-24, 2006.

 

  1. Ramirez-Angulo, A. J. Lopez-Martin, R. G. Carvajal, “Differential pairs with improved CMRR, extended common mode input range and reduced supply requirements,” DCIS 2006, Barcelona Spain, November 22-24, 2006.

 

  1. Lopez-Martin, R. G. Carvajal, J. Ramirez-Angulo, “Highly Linear CMOS Transconductors Based on Current Conveyors,” DCIS 2006, Barcelona Spain, November 22-24, 2006.

 

  1. L. Ruiz-Chavira, J. Ramirez-Angulo, A. Lopez-Martin, R. G. Carvajal, and A. Torralba “Low-Voltage CMOS Amplifier with 4 Bit Programmable Gain,” DCIS 2006, Barcelona Spain, November 22-24, 2006.

 

  1. López-Morillo, R. G. Carvajal, Juan A. G. Galán, J. Ramirez-Angulo, A.Lopez-Martin1 and  Rodríguez-Villegas, “ A Very Low-Voltage Low-Power QFG-based Sigma-Delta Modulator for Electroencephalogram Applications,”  2006 IEEE Biomedical Systems and Circuits Conference, November 29th-Dec 1st, The British Library, London.

 

  1. Calvo, S. Celma, M. T. Sanz, J. Ramirez-Angulo, “A High-Linear Low-Voltage CMOS Tunable Transconductor for VHF Filters,” 13th IEEE ICECS 2006, Nice France, December 10-13, 2006.

 

  1. L. Ruiz-Chavira, J. Ramirez-Angulo, A.J. Lopez-Martin, R.G. Carvajal and A. Torralba, “Low-Voltage CMOS Single Ended and Fully Differential Amplifier with Programmable Gain” 2007 IEEE International Symposium on Circuits and Systems, New Orleans, USA, May 27-30, 2007.

 

  1. Ramirez-Angulo, R. Chintham, R.G. Carvajal and A.J. Lopez-Martin, C.”Class AB Pseudo-Differential CMOS Squarer Circuit” 2007 IEEE International Symposium on Circuits and  Systems,  New Orleans, USA, May 27-30, 2007.

 

  1. G. Carvajal A. Torralba and J. Galan, J. Ramirez-Angulo and A. Lopez-Martin, “A Very Linear OTA Using V/I Conversion Based on Quasi-Floating MOS Transistors” 2007 IEEE International Symposium on Circuits and Systems,  New Orleans, USA, May 27-30, 2007.

 

  1. Padilla, J. Ramirez-Angulo R. G. Carvajal and A. Lopez-Martin, “Highly Linear V/I Converter with Programmable Current Mirrors” 2007 IEEE International Symposium on Circuits and  Systems,  New Orleans, USA, May 27-30, 2007.

 

  1. Paul Vizcaino, Jaime Ramirez-Angulo and Umeshkumar Patel ,“Low-Power CMOS Readout Integrated Circuits with Time Delay Integration for Infrared Focal Plane Arrays,” Austin Conference on Integrated Systems & Circuits 2007
    Austin, May 13 – 15, 2007.

 

  1. Annajirao Garimella, Lalitha M. Kalyani-Garimella, Jaime Ramírez-Angulo, R.G. Carvajal and A. J. Lopez-Martin “Low-Voltage Universal Capacitive Threshold Logic Gate and its Application in m-out-of-n Functions,” 50th IEEE Midwest Symposium on Circuits and Systems, 5-8 2007, Montreal, Quebec, CA.

 

  1. Jaime Ramirez-Angulo, Paul Vizcaino,, “New Low-Power Current Memory Circuits,” 50th IEEE Midwest Symposium on Circuits and Systems, Aug. 5-8 2007, Montreal, Quebec, CA.

 

  1. Jaime Ramirez-Angulo, Antonio Lopez-Martin, Annajirao Garimella, Lalitha M. Kalyani-Garimella, Randy Romero and Low-Voltage, Low-Power Rail-to-Rail two stage Op-amp with Dynamic Biasing and no Miller compensation, 50th IEEE Midwest Symposium on Circuits and Systems, Aug. 5-8, 2007 Montreal, Quebec, CA.

 

  1. Ramon G. Carvajal, “Versatile Multidecade CMOS Voltage Controlled Oscillator with Accurate Amplitude and PWM Control,” 50th IEEE Midwest Symposium on Circuits and Systems, Aug. 5-8, 2007  Montreal, Quebec, CA.

.

  1. Annajirao Garimella, Lalitha M. Kalyani-Garimella, Randy Romero and Jaime Ramirez-Angulo, “Versatile Multidecade CMOS Voltage Controlled Oscillator with Accurate Amplitude and PWM Control,” 50th IEEE Midwest Symposium on Circuits and Systems, Aug. 5-8 2007, Montreal, Quebec, CA.

 

  1. L. Chavira, J. Ramirez-Angulo Nad C. Brislawn, “Implementation of Accurate Blind Real Time Interference Suppression,” 50th IEEE Midwest Symposium on Circuits and Systems, Aug. 5-8 2007, Montreal, Quebec, CA.

 

  1. Ramirez-Angulo, B. Calvo, R.G. Carvajal, and A. Lopez-Martin, “Class AB Fully Differential Voltage followers,” IEEE European Conference on Circuit Theory and Design, Seville, Spain, August 26-30, 2007.

 

  1. J. Ramírez-Angulo, A. Garimella, L. M. Kalyani-Garimella M. Sawant, A. Lopez-Martin and Ramon G. Carvajal, “Low Voltage Gain Boosting Schemes for One Stage Operational Amplifiers,” IEEE European Conference on Circuit Theory and Design, Seville, Spain, August 26-30, 2007.

 

  1. ,J. Ramirez-Angulo, B. Calvo, S. R. S. Garimella, and S. Celma, “New highly-accurate CMOS source-degenerated based  V-I converter with positive feedback,” ,”  IEEE European Conference on Circuit Theory and Design, Seville, Spain, August 26-30, 2007.

 

  1. Sánchez-Rodríguez, R. G. Carvajal, S. L. Khemchandani, J. Del Pino, J. Ramírez-Angulo, A. López-Martín, “Low-Power complex filter for WLAN applications,” DCIS 2007, November 21-23, 2007 Seville, Spain

 

  1. López-Martín, R. G. Carvajal, J. Ramírez-Angulo, “Output Current Folding versus Current Mirroring in CMOS Transconductors,”
    DCIS 2007, November 21-23, 2007 Seville, Spain

 

  1. I. Lujan-Martinez, R. G. Carvajal, A. Torralba, A. López-Martín, J. Ramírez-Angulo, U. Alvarado “A Low-Power Baseband Filter For Zero-IF DVB-T/H Receivers,” DCIS 2007, November 21-23, 2007, Seville, Spain.

 

  1. Ramirez-Angulo, Jaime; Kalyani-Garimella, Lalitha Mohana; Garimella, Annajirao; Garimella, Sri Raga Sudha; Lopez-Martin, Antonio; Carvajal, Ramon Gonzalez, “ An Input Stage for the Implementation of Low-Voltage Rail to Rail Offset Compensated CMOS Comparators,” 21st International Conference on VLSI Design 2008,
    4-8 Jan. 2008 pp. 294 – 299.

 

  1. López-Martin, R. G. Carvajal, E. López-Morillo, L. Acosta, T. Sánchez-Rodriguez, C. Rubia-Marcos, J. Ramírez-Angulo, “Low-Voltage Power Efficient Amplifiers for Emerging Applications, “ AACD 2008 | 17th Workshop on Advances in Analogue Circuit Design. April, 8-10, 2008, Pavia, Italy

 

  1. Ramirez-Angulo, C. I. Lujan-Martinez, C.Rubia-Marcos, R.G. Carvajal and A. Lopez-Martin, “Rail to Rail Fully Differential Sample and Hold Based on Clocked Differential Difference Amplifier Using Resistive Local Common Mode Feedback”, Austin Conference on Integrated Circuits, May 7-9 2008.

 

  1. Calvo, S. Balasubramanian, J. Ramirez-Angulo, A. J. Lopez-Martin and R.G. Carvajal, “Linear-Enhanced V to I Converters based on MOS Resistive Source Degeneration, 2008 IEEE International Symposium on Circuits and Systems, Seattle Washington, May 21-23, 2008 (accepted for presentation)

 

  1. Sanchez-Rodriguez C.I Lujan-Martinez, and R.G.Carvajal, J. Ramirez-Angulo and A.J. Lopez-Martin, “A CMOS Linear Tunable Transconductor For Continuous-Time Tunable Gm-C Filters,” 2008 IEEE International Symposium on Circuits and Systems, Seattle Washington, May 21-23, 2008 (accepted for presentation)

 

  1. Ramirez-Angulo, R.G.Carvajal and A. J. Lopez-Martin ,”High slew rate two stage A/AB and AB/AB op-amps with phase lead compensation at output node and local common mode feedback,” 2008, IEEE International Symposium on Circuits and Systems, Seattle Washington, May 21-23, 2008

 

  1. Acosta Cabanillas, R.G.Carvajal, J. Ramirez-Angulo,and A. J. Lopez-Martin ,” A simple approach for the implementation of CMOS amplifiers with constant bandwidth independent of gain High slew rate two stage A/AB and AB/AB op-amps with phase lead compensation at output node and local common mode feedback,” 2008 ,IEEE International Symposium on Circuits and Systems, Seattle Washington, May 21-23, 2008

 

  1. Torralba, J.Galán, C. Luján-Martínez and R.G.Carvajal, J. Ramirez-Angulo and A.J. Lopez-Martin, “Comparison of programmable linear resistors based on quasi-floating gate MOSFETs, 2008 ,IEEE International Symposium on Circuits and Systems, Seattle Washington, May 21-23, 2008

 

  1. Lujan-Martínez, A. Torralba and R.G.Carvajal, J. Ramirez-Angulo and A.J. Lopez-Martin, “A -72 dB IM3 CMOS Tunable Pseudo-Differential Transconductor,” 2008 ,IEEE International Symposium on Circuits and Systems, Seattle Washington, May 21-23, 2008.

 

  1. R.S. Garimella, J. Ramirez-Angulo, A. Lopez-Martin and R.G. Carvajal, “Design of Highly Linear Multipliers using Floating Gate Transistors and/or Source Degeneration Resistor,” 2008, IEEE International Symposium on Circuits and Systems, Seattle Washington, May 21-23, 2008.

 

  1. Christian J. B. Fayomi, J. Ramirez-Angulo and Gilson I. Wirth, “Low-Voltage Flipped Voltage Follower based Fully Differential Sample-and-Hold Circuit,” 2008, IEEE International Symposium on Circuits and Systems, Seattle Washington, May 21-23, 2008.

 

  1. R.S. Garimella, A. Garimella.; L.M. Kalyani-Garimella; J. Ramirez-Angulo, “Low depth carry look ahead circuits using rail-to-rail capacitive threshold logic, “ Midwest Symposium on Circuits and Systems, 2008. MWSCAS 2008. 51st Midwest Symposium on, 10-13 Aug. 2008 Page(s):574 – 577

 

  1. Trinidad Sánchez-Rodríguez, Ramon Gonzalez Carvajal , Antonio Lopez-Martin, Jaime Ramirez-Angulo, Carlos Rodrigo Rubia-Marcos, “ A CMOS Tunable Transconductor With Gain Boosting Enhancement With Application in Gm-C Filters,” DCIS 2008, Grenoble, France, November 12-14 2008.

 

  1. Lucia Acosta, Antonio Lopez-Martin Ramon G. Carvajal, Jaime Ramirez-Angulo “Class AB CMOS Transconductor for Channel Filtering in Zero-IF/Low-IF Wireless Receivers,”, DCIS 2008, Grenoble, France, November 12-14 2008.

 

  1. Juan A. Gomez-Galan, Manuel Pedro, Ramon G. Carvajal, Antonio Lopez-Martin, Jaime Ramirez-Angulo, Clara-Isabel Lujan-Martinez , “A Tunable Low-Voltage Transconductor with High Linearity, “DCIS 2008, Grenoble, France, November 12-14 2008.

 

  1. Jaime Ramirez-Angulo, Clara-Isabel Lujan-Martinez, Carlos Rodrigo Rubia-Marcos, Ramon G. Carvajal, Antonio Lopez-Martin, “Rail to Rail Fully Differential Track and Hold Based on Clocked Differential Difference Amplifier Using Resistive Local Common Mode Feedback, “DCIS 2008, Grenoble, France, November 12-14 2008.

 

  1. Antonio Lopez-Martin (Public University of Navarra), Jaime Ramirez-Angulo, Ramon G. Carvajal, Lucia Acosta , “CMOS Class AB Super Source Follower,” DCIS 2008, Grenoble, France, November 12-14 2008.

 

  1. Antonio Lopez-Martin, Jaime Ramirez-Angulo, Ramon G. Carvajal., “Micropower High-Drive CMOS Current Feedback Operational Amplifier,” DCIS 2008, Grenoble, France, November 12-14 2008.

 

  1. Juan Antonio Gomez Galan , Antonio Lopez-Martin, Jaime Ramirez-Angulo, , “DC Offset Control Circuit with Application in a Zero-IF 0.18 um CMOS Bluetooth Receiver Chain,” Trinidad Sánchez-Rodríguez , Ramon Gonzalez Carvajal, DCIS 2008 Grenoble, France, November 12-14 2008.

 

  1. Ramirez-Angulo, R.G. Carvajal and. A. Lopez-Martin, , “Techniques for the Design of Low voltage Power Efficient Analog and Mixed-signal Circuits,” (Tutorial presentation) The 22nd International Conference on VLSI Design, New Dehli India, Jan, 8-9 2009

 

  1. Acosta, J. Ramirez-Angulo, R.G. Carvajal and A. Lopez-Martin, “Low voltage first order fully differential CMOS all-pass filter with programmable pole-zero”, XV Workshop Iberchip, Buenos Aires – Argentina, 25 – 27 de Marzo de 2009.

 

  1. Design of Low voltage power efficient analog and mixed signal circuits in deep sub-micrometer CMOS technology, Tutorial Presentation, IEEE Midwest Symposium on Circuits and Systems, 2-4, 2009, Cancun Mexico

 

  1. Antonio J. Lopez-Martin, Lucía Acosta, Jose M. Algueta, Jaime Ramirez-Angulo, Ramon G. Carvajal, “Micropower Class AB CMOS Current Conveyor Based on Quasi-Floating Gate Techniques,” IEEE Midwest Symposium on Circuits and Systems, Aug. 2-4, 2009, Cancun Mexico

 

  1. Luis F. Cisneros-Sinencio, Alejandro Diaz-Sanchez, Jaime Ramirez-Angulo, Carlos A. Gracios-Marin, “Floating-Gate Energy Recovery Logic,” IEEE Midwest Symposium on Circuits and Systems, Aug. 2-4, 2009, Cancun Mexico J. Ramirez-Angulo,   DCIS 2009,

 

  1. Belen Calvo, Jaime Ramirez-Angulo, Antonio Lopez-Martin, Ramon G. Carvajal,” Low-Voltage CMOS Cross-Quad Implementation based on Dynamic Positive Feedback,” IEEE Midwest Symposium on Circuits and Systems, Aug. 2-4, 2009, Cancun Mexico

 

  1. Marri, J. Ramirez-Angulo, A. Lopez-Martin and R.G. Carvajal, “A new scheme for DC offset compensation and its application to current mode and voltage mode D/A converters,” ECCTD 2009, Antalya, Turkey, August 23-27, 2009.

 

  1. Sánchez-Rodríguez, J. Ramírez-Angulo, R. G. Carvajal and A. López-Martín,”Challenges of Analog Design in Deep Submicron CMOS Technology and Techniques to Overcome Them,” CMOS-ET Workshop, Sept. 23-25, 2009 Vancouver.

 

  1. Alvidrez-Hernandez, and J. Ramirez-Angulo, “A High Resolution Low Voltage Rail-to-Rail Comparator Based on Floating and Quasi-Floating Gate Techniques,” ACISC 2009, Oct. 26-27, Austin, TX.

 

  1. Calvo, J. Ramirez-Angulo, A.J. Lopez-Martin and R.G. Carvajal, “Accurate Dynamic –Feedback CMOS Crossquad suitable for low voltage operation,” DCIS 2009, Nov. 18-20, Zaragoza, Spain.

 

  1. Garcia-Albert, L. Acosta, A.J. Lopez-Martin, J. Ramirez-Angulo, and R.G. Carvajal, “Tunable Class AB CMOS Gm-C Channel Filter for a Bluetooth zero IF receiver,” DCIS 2009, Nov. 18-20, Zaragoza, Spain.

 

  1. Aguado-Ruiz,  A.J. Lopez-Martin, J. Ramirez-Angulo, “Three novel Improved CMOS Capacitance Scaling Schemes,” DCIS 2009, Nov. 18-20, Zaragoza, Spain.

 

  1. Marri, J. Ramirez-Angulo, A.J. Lopez-Martin and R.G. Varvajal “New High Performance Second generation CMOS Current Conveyor,” DCIS 2009, Nov. 18-20, Zaragoza, Spain.

 

  1. Acosta,  A.J. Lopez-Martin, R.G. Carvajal and J. Ramirez-Angulo, “Rail to Rail Class AB CMOS Tunable Transconductor with -52dB IM3 at 1MHz,” DCIS 2009, Nov. 18-20, Zaragoza, Spain.

 

  1. .”Cascode dynamic current calibration: A new scheme for implementation of highly accurate current memories,” Jaime Ramírez-Angulo, Enrique López-Morillo, Antonio J. Lopez-Martin and Ramon G. Carvajal, LASCAS 2010, Iguazu Falls, Brazil, February 24-26, 2010

 

  1. “Tunable Rail-to-Rail FGMOS Transconductor,” José M. Algueta Miguel, Antonio J. Lopez-Martin, Jaime Ramirez-Angulo. IEEE ISCAS 2010, Paris, France May 29-June 2, 2010.

 

  1. “Compact Low-Voltage CMOS Current-Mode Multiplier/Divider,” Antonio Lopez-Martin, Carlos De La Cruz, Jaime Ramirez-Angulo, Ramon G. Carvajal, IEEE ISCAS 2010, Paris, France May 29-June 2. 2010

 

  1. “Novel CMOS Capacitance Scaling Techniques,” Jesus Aguado Ruiz, Antonio Lopez-Martin, Jaime Ramirez-Angulo, IEEE ISCAS 2010, Paris, France May 29-June 2, 2010

 

  1. “Low-Voltage gm-Enhanced CMOS Differential Pairs Using Positive Feedback, “Jaime Ramirez-Angulo, Belen Calvo, Ramon Carvajal, Antonio Lopez-Martin, IEEE ISCAS 2010, Paris, France May 29-June 2.

 

  1. “CMOS Operational Amplifiers with Continuous-Time Capacitive Common Mode Feedback,”, Jaime Ramirez-Angulo, Ayesha Nargis, Ramon Carvajal, Antonio Lopez-Martin, IEEE ISCAS 2010, Paris, France May 29-June 2.

 

  1. Class AB CMOS Tunable Transconductor, Coro Garcia-Alberdi, Antonio J. Lopez-Martin, Lucia Acosta-Cabanillas, Ramon G. Carvajal and Jaime Ramirez-Angulo  IEEE Midwest Symposium on Circuits and Systems, August 1st-4th 2010, Seattle, WA .

 

  1. New Low Voltage VT Extraction Circuits, Ramirez-Angulo, Sailaja Venkata Kasaraneni, Antonio J. Lopez-Martin and Ramon G. Carvajal,  IEEE Midwest Symposium on Circuits and Systems, August 1st-4th 2010, Seattle, WA

 

  1. , Ramirez-Angulo, Sailaja Venkata Kasaraneni, Antonio J. Lopez-Martin and Ramon G. Carvajal, IEEE Midwest Symposium on Circuits and Systems, August 1st-4th 2010, Seattle, WA

 

  1. Simple Low Voltage, Low Power Implementations of Circuits for VT Extraction, Ramirez-Angulo, Sailaja Venkata Kasaraneni, Antonio J. Lopez-Martin and Ramon G. Carvajal, DCIS 2010: XXV Conference on Design of Circuits and Integrated Systems,  Nov 17-19th, 2010 Lanzarote, Canary Islands, Spain,

 

  1. “Accurate Low voltage Current Mode Analog WTA and Rank Order Circuits, Jaime Ramirez-Angulo, Radhika Maryada. Antonio J. Lopez-Martin, and Ramon G. Carvajal, DCIS 2010: XXV Conference on Design of Circuits and Integrated Systems,  Nov 17-19th, 2010, Lanzarote, Canary Islands, Spain .

 

  1. “Two-Stage Class AB QFG CMOS Buffers, Coro Garcia-Alberdi, Antonio J. Lopez-Martin, Lucia Acosta-Cabanillas, Ramon G. Carvajal and Jaime Ramirez-Angulo,”  DCIS 2010: XXV Conference on Design of Circuits and Integrated Systems,  Nov 17-19th, 2010, Lanzarote,  Canary Islands, Spain, “

 

  1. “A 200 uW CMOS Unity-Gain Buffer with Extended Input Range”,” Coro Garcia-Alberdi,  Antonio J. Lopez-Martin, Lucia Acosta-Cabanillas, Ramon G. Carvajal and Jaime Ramirez-Angulo,  ESSDERC/ESSCIRC 2010, Seville from 13-17 September 2010.

 

  1. A New Family of Micropower Class AB Quasi-Floating Gate Transconductors Antonio Lopez-Martin, Jose M. Algueta, Coro Garcia-Alberdi, Lucia Acosta, Jaime Ramirez-Angulo and Ramon G. Carvajal, DCIS Conference on Design of Circuits and Integrated Systems,  Nov 16-18th, 2011, Albufeira, Portugal

 

  1. Power-Efficient High-Performance Class AB Current Mirror Fermin Esparza-Alfaro, Antonio Lopez-Martin, Jaime Ramírez-Angulo and Ramón G. Carvajal. DCIS Conference on Design of Circuits and Integrated Systems,  Nov 16-18th, 2011, Albufeira, Portugal

 

  1. Compact Class AB Op-Amps With Approximately Symmetrical Slew Rate Paper Jesus Aguado-Ruiz, Jaime Ramirez-Angulo, Javier Lopez-Lemus, Antonio Lopez-Martin and Ramon G. Carvajal, DCIS Conference on Design of Circuits and Integrated Systems,  Nov 16-18th, 2011, Albufeira, Portugal

 

  1. “Simple Improvement Stage for Low Voltage WTA and Rank Order Circuits”, Jesus Ezequiel Molinar-Solis, Rodolfo Garcia-Lozano, Alejandra Mora, 2011 IEEE International Symposium on Circuits and Systems, Rio de Janeiro, Brazil from 15-18 May 2011

 

  1. “Active and Passive Dynamic Cascode Calibration Schemes for High Precision Current Sources”, Jaime Ramírez-Angulo, Enrique López-Morillo, Ramon G. Carvajal, Ant. 2011 IEEE International Symposium on Circuits and Systems,Rio de Janeiro, Brazil from 15-18 May 2011.

 

  1. J. López-Martín, F. Esparza-Alfaro, J. Ramírez-Angulo, and R.G. Carvajal “Accurate Micropower Class AB CMOS Voltage-to-Current Converter”, IEEE ECCTD August 29-31,2011  Linkoping, Sweden

 

  1. Low-Voltage Highly-Linear Class AB Current Mirror with Dynamic Cascode Biasing

Fermin ESPARZA-ALFARO, Antonio LOPEZ-MARTIN , Ramón GONZALEZ-CARVAJAL , Jaime RAMIREZ-ANGULO, DCIS 2012, Nov. 28-30, 2012, Avignon, France.

 

  1. Wide-Range CMOS Transconductor Based on FGMOS Regulated Cascode Current Followers, Jose M. ALGUETA-MIGUEL, Antonio LOPEZ-MARTIN , Jaime RAMIREZ-ANGULO , Ramon CARVAJAL, DCIS 2012, Nov. 28-30, 2012, Avignon, France.

 

  1. 16 Level 0 to 36dB Automatic Gain Control With Adaptive Compensation Jesus Aguado Ruiz, Antonio LOPEZ-MARTIN , Jaime Ramirez-Angulo , DCIS 2012, Nov. 28-30, 2012, Avignon, France.

 

  1. Limitations of CAD Tools for Modeling Transistors that Implement Large Resistors, E. Cabrera-Bernal, C. Lujan-Martinez , R.G. Carvajal and Jaime Ramirez-Angulo, DCIS 2012, Nov. 28-30, 2012, Avignon, France.

 

  1. Internally compensated LDO regulator based on the Folded FVF Jose Hinojo, Clara Lujan, Antonio Torralba, Jaime Ramirez-Angulo, DCIS 2012, Nov. 28-30, 2012, Avignon, France.

 

  1. “Micropower Class AB Voltage Followers with Simple Quiescent Current Control, “Lopez-Martin, A.J.; Oses, E.; Ramirez-Angulo, J.; Carvajal, R.G. IEEE 55th International Midwest Symposium on Circuits and Systems ,Boise Idaho, August 5-8, 2012 Page(s): 218 – 221.

 

  1. Improved Technique for Continuous Tuning of CMOS Transconductor, Jose M. Algueta and Antonio J. Lopez-Martin, J. Ramirez-Angulo and R.G. Carvajal, IEEE ISCAS 2013, Beijing, China, May 19-23 2013.

 

  1. Energy-Efficient Class AB CMOS Sample and Hold Circuit, Antonio J. Lopez-Martin, Xabier Ugalde , and Jaime Ramirez-Angulo, Eurocon 2013, July 1-4, Zagreb Croatia

 

  1. Combining bulk-driven and RC-coupling for ultra-low voltage analog design, Clara Lujan-Martinez, Antonio Torralba, Ramon Carvajal, Jaime Ramirez-Angulo, Unai Alvarado and Javier Del Pino, DCIS 2013, November 27-29, Donostia-San Sebastian, Spain.

 

  1. Designing a narrow band PLC front-end platform Designing a narrow band PLC front-end platform, Sadot Alexandres, Javier Matanza, Carlos Rodriguez-Morcillo and Jaime Ramirez-Angulo, DCIS 2013, November 27-29, Donostia-San Sebastian, Spain.

 

  1. Implementation of two stage CMOS op-amp with very low open loop DC gain based on the QFG technique, José M. Algueta Miguel, Jaime Ramírez-Angulo, Antonio J. López Martín and Ramón González Carvajal, DCIS 2013, November 27-29, Donostia-San Sebastian, Spain.

 

  1. “CMOS op-amps for biomedical Applications,” JM. Algueta, J. Ramirez-Angulo, A. Lopez-Martin, C.A. de La cruz-Blas, R.G. Carvajal, IEEE International Symposium on Circuits and Systems, June 1-5, 2014 Melbourne, Australia

 

  1. “PSRR Enhancement based on QFG for Low Voltage, Low Power Design,” MR, Valero-Bernal, J. Ramirez-Angulo, N. Medrano and S. Celma, IEEE International Symposium on Circuits and Systems, June 1-5, 2014 Melbourne, Australia

 

  1. “Rail to Rail CMOS Complementary Input Stage with alternating active differential pairs,”, MR, Valero-Bernal, A. Roman-Loera, Ramirez-Angulo, N. Medrano and S. Celma, IEEE International Symposium on Circuits and Systems, June 1-5, 2014 Melbourne, Australia

 

  1. “Simple and Efficient Removal of Baseline Drift in Electrocardiographic Signal Acquisition,” Antonio Lopez-Martin, Maria Espadas Sucunza, Jaime Ramirez-Angulo and Ramon G. Carvajal, DCIS 2014, Madrid, Spain November 26-28 (paper 99)

 

  1. “High-Performance Digital Subthreshold Logic,” Daniel Orradre, Antonio Lopez-Martin, M. Pilar Garde, Jaime Ramirez-Angulo and Ramon G. Carvajal, DCIS 2014, Madrid, Spain November 26-28, 2014 (paper 79)

 

  1. “Highly-Linear Tunable Class AB CMOS Gm-C Filter with Automatic Tuning Control,” Coro Garcia-Alberdi, Antonio Lopez-Martin, Juan A. Galan, Jaime Ramirez-Angulo and Ramon G. Carvajal DCIS 2014, Madrid, Spain November 26-28 2014 (paper 78)

 

  1. “Source Compensated Miller Op-Amps: A Simple Approach to Enhance Amplifier’s Bandwidth,” Jaime Ramírez-Angulo, Enrique Mirazo, Javier Lemus, Jose M Algueta-Miguel, Antonio J. López-Martín, Alejandro Díaz-Sánchez and Ramón G. Carvajal, DCIS 2014, Madrid, Spain November 26-28, 2014   (paper 80)

 

  1. “An Output Capacitorless Low Dropout Voltage Regulator With A Novel Fast Settling Path, Jose Maria Hinojo, Clara Luján-Martinez, Antonio Torralba, Jaime Ramirez Angulo, Guillermo Bistue and Javier Del Pino, DCIS 2014, Madrid, Spain November 20-23, 2014 (paper 86)

 

  1. “0.13um CMOS Variable Gain Amplifier Usding a Novel Tunable Triode Transconductor,” Trinidad Sanchez, Juan Antonio Gomez-Galan, Antonio Lopez-Martin, Ramon Gonzalez Carvajal and Jaime Ramirez Angulo, DCIS 2014, Madrid, Spain November 20-23, 2014  (paper 86)

 

  1. “Constant gm Rail to Rail CMOS Op-Amp with Only One Differential Pair and Switched Level Shifter,” R. Valero, Alejandro Roman-Loera, J. Ramírez-Angulo, A. Lopez-Martin, R. G. Carvajal, IEEE ISCAS 2015, Lisbon Portugal, May 24-27, pp. 2461-2464.

 

  1. “Class AB Two Stage and Folded Cascode Op-Amps Based on a Squaring Circuit”, R. Valero, S. Thoutam, J. Ramírez-Angulo, A. Lopez-Martin, R. G. Carvajal IEEE ISCAS 2015, Lisbon Portugal, May 24-27, 2015, Pages: 253 – 256

 

  1. Highly Accurate CMOS Second Generation Current Conveyor and Transconductor, Lopez-Martin A.J., Ramirez-Angulo J. and Carvajal R.G., J. Lopez-Martin; J. Ramirez-Angulo; R. G. Carvajal – International Conference on Computer as a Tool (EUROCON), IEEE , September 8-11, Salamanca, Spain, 2015 Pages: 1 – 4, DOI: 10.1109/EUROCON.2015.7313765

 

364.          Energy harvesting microsystems based on the QFG MOS transistors, Lopez-Martin A.;  Orradre D.; M. P. Garde; P. Sanchis; E. Gubia; G. Perez; D. Astrain;  Ramírez-Angulo J.,  (EEEIC), IEEE 15th International Conference on Environment and Electrical Engineering, June 10-13, Rome Italy, 2015 ,Pages: 2035 – 2039, DOI: 10.1109/EEEIC.2015.7165488

 

 

 

 

7. Thesis supervised

7.1 PhD, Thesis

 

W.J. Adams, CMOS Operational Amplifiers with extended Transconductance adjustment ranges, Texas A&M University, 1991,

 

Yin Rong, Performance Characterization of Monolithic Thin Film Resistors, Texas A&M University, 1990

 

Seung Chul Choi, Building Blocks for a Fillter Tuning System Using an Analog VLSI Fuzzy Logic Controller, NMSU, 1996

 

Alejandro Diaz Sanchez, Design and Implementation of VLSI Analog Adaptive Filters, NMSU, 2000

 

Noel Carlos Faliero Carneiro, Analog Building Blocks for implementation of an adaptive algorithm for resistive grid applications, NMSU  1999

 

Jeffrey S.. Beasley, “An iDD Transient Analysis Technique for Defect Detection in Integrated Circuits, NMSU, 1995

 

Gladys Omayra, Ducoudray Acevedo, Built-In Self-Test Schemes for Analog and Mixed Signal Devices, 2003, NMSU (Most outstanding NMSU Ph.D. student in 2003)

 

Chhaya Patil, Novel Gain Boosting Schemes for CMOS op-amps, NMSU 2012

 

Alejandro Roman Loera, Rail-to-rail and Class AB-AB op-amps in deep submicrometer CMOS technology, NMSU May 2015

 

 

7.1 MS Thesis Supervised

 

 

Michael Leigh Holmes, Application of Local Common Mode Feedback Techniques to Enhance Slew Rate and Gain-Bandwidth of CMOS Operational Amplifiers, NMSU December 2002

 

Kevin Howard Treece, A digitally Configurable Analog VLSI Chip for Real-time Solution of Laplace’s Equation, ,NMSU May 1994

 

Francisco Ledesma, Multiple Input Linear Weighted Addition Circuits, Design and Implementation in VLSI, NMSU December 2002

 

Carlos Fernando Nieva Lozano, Low Voltage, Class AB and High Slew Rate Two Stage Operational Amplifiers, NMSU December 2000

 

 

Chandrika Durbha Design of Highly Linear Wide Range, Gm adjustment CMOS and BiCMOS OTA using Translinear Loops in moderate Inversion and their applications, NMSU May 2004

 

Gabriel Escarpita Monarrez, Analog VLSI Fully Programmable Piecewise Linear Approximation System, NMSU, December 2004

 

Manoj Bikumandla, Design of High Performance Low Voltage Building Blocks using floating gate Transistors and Large Valued Resistors, NMSU December 2004.

 

Sushmita Baswa, Low Voltage, Low Power Class AB op-amps with greatly enhanced slew rate and Bandwidth and application of floating gates to achieve Rail-to-rail input and output swing, NMSU, May 2004

 

Shanta Thoutam, Design and Implementation of High Performance Low-Voltage CMOS Analog Building Blocks, NMSU, June 2004

 

Ivan R. Padilla, A New High Performance Low-Voltage Analog Cell and Applications, NMSU, May 2004

 

Randy Leroy Romero, A compact Approach fro CMOS Analog Function Synthesis, NMSU, December 2004

 

Chad O. Lackey, Applications of  Quasi Floating Gate Transistors for Use in Low Voltage Closed Loop Amplifiers, NMSU, May 2003

 

Meghraj Sujas Kachare,m Low Voltage Building Blocks for Analog and Mixed Signal Processing, December 2003

 

 

Rahul Shukla, Components for Current Mode Data Converters, NMSU, May 2005

 

 

Milind Subhash Sawant, Novel High Performance Current Mirror’s OTA’s and Op-Amps fro Low Voltage Analog Design, December 2005

 

 

Elizabeth Villa Covarrubias, Design and Implementation of a Universal Integrated Tow-Thomas Filter suing multiplying OTAs and a a new Current Sensing Technique, NMSU May 2005

 

Laura I. Escobedo Rivera, Voltage Mode and Current Mode VLSI Continuous Time Biquadratic Filter based on Unity Gain Low Pass Building Blocks, NMSU May 2005

 

Manuel Aragon, A Linearization Technique for an Operational Transconducatnce Amplifer Using a Single Triode-Operated CMOS Transistor, NMSU, May 2005

 

Pedro Pablo Chavarria Cedillo, Programmable Trigger Generator ASIC for Measurement Synchronization of NTSC Video Signals, NMSU May 2006

 

Sheetal Gupta, Low Voltage, High Performance CMOS Buffers and their Applications, NMSU, November 2006

 

Patricia Saavedra-Payton, Programmable Operational Transconductance Amplifier Circuit Building Blocks for Implementation in Fuzzy Logic Systems, NMSU, December 2006

 

Lalitha Mohana Kalyani Garimella, A Universal Low Voltage Compact Cell fro Mixed Signal VLSI Field Programmable Gate Arrays, NMSU May 2006 (Most outstanding NMSU MS student in 2006)

 

 

Paul M/ Vizcaino, Low Power Time Delay Integration CMOS Infrared Readout Circuits, NMSU, April 2007

 

Jose Luis Ruiz Chavira, Low Voltage CMOS Amplifier with 4 bit Programmable Gain, NMSU April 2007

 

Dimple Chirumamilla, Design of Novel First order Fully Differential  Allpass Filters and Amplifiers with Voltage programmable Gain  in CMOS Technology, NMSU 2007

 

 

Sri Raga Sudha Garimella, Novel Low Voltage, Power Efficient and Compact CMOS Analog and Digital Circuits, NMSU December 2007 (most outstanding NMSU MS student 2007)

 

 

Sandhana Balasubramanian, Dynamic Floating Gate Rail to Rail OP-amp with Improved CMRR and Linear Enhanced V-I converters based on the QFG Technique and MOS Resistive Source Degeneration, NMSU, May 2008

 

Javier Hernandez Alvidrez, Applications of Floating and Quasi Floating gates techniques for reducing the input DC offset in Low Voltage Comparators and Operational Amplifiers, NMSU April 2010

 

Rashmi Lakkur Subramanyam, Two Stage Operational Amplifier with Enhanced CMRR and Slew Rate, NMSU, June 2011

 

Thilak K Poriyani House Raju, Implementation of a Novel Fully Integrated AC coupled Wideband Biometric CMOS Amplifier with Low Supply Voltage and High Signal Swing, NMSU, June 2011

 

Chhaya Patil

 

Swati Marri

 

Javier Cerna

 

Sailaja Kasaraneni

 

DanielMendoza

 

Manvi Tummala, June 2014, Class AB amplifiers using FVF magnitude detector circuits (Technical report)

 

 

 

 

  1. FUNDING

 

RETURN TO TOP

 

Principal Co-investigator of the Project “Characterization of Silicon‑Chrome on MOS” Texas Instruments (TI), Texas A&M University,(1985:$55,000, 1986:$22,000, 1987,1988, 1989,1990: $37,000 each year.

 

Principal Investigator of the Project “Modeling of Parasitic Resistances and Capacitances in Bipolar Transistors”, Texas Instruments (TI), Texas A&M University,($42,000 April 1989 ‑ March 1990)

 

Principal Investigator (with J. Beasley and S. Castillo) of proposal:”Improvement of VLSI Systems at New Mexico State University, AT&T Foundation, $10,000, October 1991

 

Principal Investigator of Project “Real Time Solution of Laplace Equation With Analog VLSI Circuits”, National Science Foundation, $60,000, September 1991- August 1993.

 

Principal Investigator of project, “IDDQ Testing of CMOS VLSI circuits using built in sensors with multiple emitter lateral bipolar transistors”, SANDIA National Laboratories, $30,000, NMSU # 92948, October 1992- September 1993.

 

Principal Investigator of project, “CISE Research instrumentation for Microelectronics,” National Science Foundation, $99,520, August 1993- July 1995, NSF proposal CDA-9222883.

 

Principal Investigator of “Memo of Understanding between NMSU and the Universidad Autonoma Metropolitana, Mexico” NMSU # 92689, February 28,92.

 

Principal Investigator of following  undergraduate research projects currently funded by CIMD-NSF (Comission to Increase Minority Degrees- National Science Foundation):

 

“Development of VLSI-oriented experiments”, “Development of a PC software tool to characterize laser trimmed film resistors,”  and “Design of an instrument to generate multiple current sources for testing of ICs,” $4014, NMSU # 92676,  Spring 1992

 

“Design and Fabrication of Bipolar and MOS transistor arrays” and  “Design of test fixtures for characterization of integrated Circuits,” $2676, NMSU # 92960, Summer 1992

 

“Development and fabrication of CMOS analog multipliers for low-power supply requirements,” $1938, NMSU # 93100, Fall 1992

 

“Development of a prototype to measure distance using ultrasonic transceivers,” and “Design and Fabrication of integrated CMOS wideband amplifiers, $2676, NMSU  # 93271, and 93272, Spring 1993

 

“Circuit Design for High Speed fuzzy Processors,” S95UR029 and Design of Integrated Current Sensors for IDDQ Testing of VLSI Systems, S95UR039: $1512

 

“Design of High Frequency BCMOS buffers,” S96UR032, “Design Implementation and Characterization of an Electronically Programmable Universal Filter, S96UR033, ” Design of Low-Voltage, Low Power Operational Amplifiers using Multiple Input Floating Gate Transistors” S96UR034, “Prototyping Analog Defuzzifiers Using Operational Transconductance Amplifers” V96UR026 total: $7,024, Spring and Summer 1996:

 

Principal Investigator of proposal: “Supplemental Supercomputer time for VLSI microelectronics”, NSF Supercomputing center proposal # MIP930001N, submitted Nov 1, 1992

 

Principal investigator of: “Development of a PC interface and software for IDDQ current sensors”, SANDIA National Labs, amount awarded: $35,000, performance period: September 1993- August 1994

 

Principal Investigator of “Built In Test Techniques for Mixed-Mode VLSI Circuits”, National Science Foundation, amount awarded: $100,000, August 1997- July 2000.

 

Principal Investigator of “Static and Dynamic current sensors for Test of Mixed-Mode VLSI Circuits”, Engineering Foundation, amount awarded: $25,000, performance period: October 1997- September 1998.

 

Research at Oak Ridge National Labs, Monolithic Systems Group, Instrumentation and Control Division, 6 weeks in Summer 1997. This was funded through ORISE Faculty Research Participation program.

 

Sabbatical research June 98-98 at Electronics Department of University of Seville in Spain

 

Principal Investigator: Equipment gift certificate 011FY00, $111,500Agilent University Grants Program  to establish a new RF-VLSI laboratory, February 23, 2000

 

Principal Investigator: Design and Fabrication  of a VLSI analog neural network for bit error rate estimation, $15,000, Air Force (subcontract trough New Mexico Highlands University), August 99-July 2000

 

Principal Investigator of “VLSI hardware implementation of Real Time Neuro-fuzzy processors with on chip learning, NASA/ACE ($48,000 subcontract trough New Mexico Highlands University), August 1999-Augsut 2000

 

Design of Mixed Signal Systems, Gift grant from Texas Instruments Inc., $150,000, August 2000-2003

 

Design of Low Voltage-Low power VLSI analog building blocks for aerospace and soft computing applications, NASA Center for Autonomous Control Engineering (subcontract trough

University of New Mexico) , $250,000 August 2000-August 2004.

 

 

Principal Co-investigator  (with Chuck Creuseure and Jo Lakey) Interference Suppression via an Analog–Digital Adaptive Microsystem (ADAM), DARPA Microsystems Technology Office (MTO), May 2006-May 2007, $206,000

 

9. GRADUATE STUDENTS

RETURN TO TOP

 

Currently advising

 

Ph.D.:                          Alejandro Roman Loera, Shanta Thoutam, Shirin Pourashraf, Anindita Paul and Hector Daniel Rios Aniles

M.Sc.:                          Ravindranath Chowdary Jonnalagadda,  Enrique A. Mirazo and  Fatimah Ghassemi,

 

 

 

10. INVITED PRESENTATIONS

 

RETURN TO TOP

 

Presentations on Statistical Circuit Design.

 

  • IIMAS-UNAM, Mexico, September 30, 1982

 

  • National Institute for Astrophysics Optics and Electronics, Puebla, Mexico, October 5, 1983

 

Presentations on Acoustic Surface Wave Filters:

 

  • October 8, 1975, August 26, 1976, CINVESTAV-IPN, MX

 

Presentations on Thin Film Hybrid Circuits

 

  • University of Stuttgart, Germany. Oct 20, 1977, July 13, 1981, Jan 18, 1982, June 12, 1980

 

  • July 18, 1993, CINVESTAV-IPN, Mexico

 

  • Applications of Operational Transconductance Amplifiers, January 2, 1989, CINVESTAV-IPN, Mexico

 

  • VLSI Systems, Instituto Tecnologico de Cd. Juarez, Mexico, September 1991,

 

  • Current Mode Filters  National Institute for Astrophysics Optics and Electronics, Puebla, Mexico, May 23, 1994

 

Short courses on Analog VLSI fuzzy processors:

 

  • 1994 Midwest Symposium on Circuits and Systems, Rio de Janeiro, Brazil, August 13, 1995.

 

  • September 29, 1994; New Mexico Highlands University, Las Vegas, New Mexico

 

  • National Institute for Astrophysics Optics and Electronics, Puebla, Mexico, May 20, 1995

 

  • Metropolitan University, Mexico, August 19, 1994

 

 

Plenary presentations

 

  • October 26, 1995, Plenary Talk, Conference Electro 95, Chihuahua City, Chih., Mexico, High Performance VLSI Analog Signal Processors

 

  • Operational amplifiers operating from a single 1V supply, CINVESTAV-IPN, Mexico, July 4th, 1996

 

  • March 13, 1997, Plenary Talk, IEEE Seminar, Chihuahua City, Chih., Mexico, High Diseno de Sistemas VLSI”

 

  • Short course: “Floating-Gate Transistors and Floating-Gate Circuit Design,  First workshop on Design of Mixed-mode Integrated Circuits and Applications, July 28-30, Cancun, Mexico

 

  • Plenary presentation: “VLSI Systems,” Basic Sciences Seminar:  Insituto Tecnologico de Merida, Mexico, November 24, 1997,

 

  • Plenary presentation: “Application of Multiple input Floating-Gate Transistors in Analog Design,” XII Conference on Design of Integrated Circuits and Systems, Seville Spain, November 19, 1997

 

Chair of Ph. D. Examination of Eva Vidal Lopez on January 26st at the Universidad Politecnica de Catalunya in Barcelona, Spain

 

Applications of Floating-gate Transistors on January 26 and 27 at the Universidad Politecnica de Catalunya in Barcelona,  and at the Universidad Rovira i Virgili in Tarragona both in Spain

 

Short course: “Low Voltage BiCMOS analog Integrated Circuits,” XII

Conference on Design of Integrated Circuits and Systems, Seville Spain, November 18, 1997

 

Plenary presentation:  VLSI Hardware for Fuzzy Logic , SAAEI98 Conference Pamplona Spain on September 16, 1998

 

Plenary presentation: “Design of VLSI Systems” CIECE 2000, March 8, 2000, Aguascalientes, Mexico

 

“Low Voltage Analog CMOS Circuits Based on Floating Voltage Sources,” Texas A&M University, July 10, 2000, Seminar

 

“Low voltage CMOS Circuits,”  IEEE 2nd Dallas Workshop on Low-Voltage and Low Power Mixed-Signal Circuits and Systems, Dallas, TX March 26th, 2000

 

“Analog VLSI: state of the art,”  Tecnologico de Monterrey, campus Toluca, Mexico March 28, 2001

 

“Continuous time-Low voltage techniques, “ Seminar of Electronics Department of National Institute for Astrophysics, Optics and Electronics (INAOE) Puebla, Mexico, April 17, 2001

 

“Design of analog VLSI Systems,” New Mexico Highlands University, September 6, 2001

 

“VLSI Systems: where Dreams come true,”  New Mexico AMP student research Conference, September 13, 2002, Las Cruces, NM

 

“VLSI Systems: State of the Art”, IMS Symposium, Tecnológico de Monterrey, Campus Cd. Juarez, Nov. 15, 2002

 

“VLSI Systems, an Overview”, Tecnologico de Monterrey, Campus Ciudad Juarez, May 13, 2003

 

Invited Presentations on  “Low Voltage Continuous-time Analog Circuit Design”:

 

Seminar of the  Autonomous University of  Puebla,  ICUAP April 10, 2003

 

November 21,  2003 DCIS Conference (Design of Integrated Circuits and Systems), Ciudad Real, Spain

 

VLSI Design 04 Conference  January 9, 2004 , Mumbai India

 

Indian Institute of Technology January 12, 2004

 

Invited presentation at conference ICEEE/CIE: Multiple Input floating gate transistors: The continuous time counterpart to Switched Capacitor circuits, Acapulco, Mexico September 10, 2004

 

“Some techniques for low supply voltage operation of  CMOS Circuits,”  IEEE  Dallas Workshop on Low-Voltage and Low Power Mixed-Signal Circuits and Systems, Dallas, TX September 27 , 2004

 

Center for Electronic Engineering Research  January 14, Pilani India

 

Indian Institute of Technology, Dehli, India January 16, 2004

 

Seminar of the Autonomous University of  Ciudad Juarez,  UACJ December 6, 2006

 

Seminar of Universidad Publica de Navarra, Pamplona, Spain, December 15, 2006

 

Mixed Signal FPGAs, Pontificia Universidad Católica del Peru, Lima Peru, March 23,      2009

 

“Techniques for  the Design of Low Voltage, Power Efficient analog and Mixed Signal

Circuits, Xilinx, Dublin, Ireland, November 17, 2009

 

“A Universal Low Voltage Compact Cell for Mixed Signal VLSI Field Programmable Gate Arrays,” CIC IPN,  Mexico City, December 4, 2009

 

“From Vacuum tubes to Nanotubes, 100 years of electronics,” Universityt of Huelva, Huelva Spain, June 9 2010

 

“Advanced topics in Design of Analog Integrated VLSI Circuits, Short Course, University of Seville, Spain, June 5-8, 2010

 

Gain Enhancement and Low Voltage Techniques for Analog Circuits in deep submicrometer CMOS Technology, Institute for Astrophysics Optics and Electronics (INAOE), Puebla , Mexico, August 17, 2010

 

CONIELECOMP 2012 22nd International Conference on electronics communications and computing, 27-29 Feb. 2012, Cholula Puebla Keynote presentation: Design of Analog Integrated Circuits in Submicrometer, Jaime Ramírez-Angulo:

 

CONAEE 2013, March 20-22, Ciudad Lerdo, Durango, Mexico, Keynote presentation : 100 years of Evolution of Electronic Systems

 

Segundo Congreso Internacional de Mecatronica, Saltillo Coahuila Mexico, November 6-9 2013. Keynote presentation : VLSI systems where dreams come true.

 

Universidad de Sevilla, Escuela Superior de Ingenieros , Sevilla, Spain , November 25 2013. Conferencia de apertura de doctorado invitada: El desarrollo de la Electronica.

 

High Performance Analog Design in deep submicrometer CMOS technologies INAOE, Puebla, Mexico 25 September 2015, 7th Seminario de Electronica y Diseno Avanzado

 

Tecnicas para operar circuitos integrados analógicos con muy baja tensión de alimentación en tecnologías submicronetrica, XI Semana de la Ingenieria de la  Universidad Politecnica de Puebla, Cholula, Puebla, 22 Oct 2015

 

Tecnologico de Ciudad Guzman Segundo Congreso Internacional de Electronica Robotica y Automatizacion, Design of High Performance analog Circuits in Depp Submicrometer CMOS Technology April 23, 2015,

 

 

Iteso, Guadalajara, Mexico June 29, Advanced New Approaches in Integrated Circuit Design

 

Cinvestav IPN, Mexico City,12th International Conference on Electrical Engineering (CCE) Some techniques for the design of high performance analog and mixed-signal circuits in deep submicrometer CMOS technologies, October 28, 2015

 

Aguascalientes,  October 20, 2015  XX Aniversario de la carrera de Ingenieria Electronica, Evolución histórica de los sistemas electrónicos de alta escala de integración: De los tubos de vacio a los nanotubos de carbono”

 

BUAP, Puebla, Mexico VI Encuentro Nacional de Ciencias Luis Rivera Terrazas,  September 22, 2015 Desarrollo de la Electronica y Perspectivas a Futuro

 

 

 

 

10. PROFESSIONAL ACTIVITIES

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IEEE fellow (January 1st 2000)

 

Member of  evaluation panel of the NSF-CISE Educational Innovation Program.   April 22, 1997, Washington D.C.

 

Attendance of short course on “Oversampled Delta-Sigma Data Converters” in Monterrey CA on February 3-5, 1997.

 

Attendance of short course Design of Analog Integrated Circuits, MIT, May 1985

 

Development of distance education M.Sc. courses for students  from Ciudad Juarez, Mexico.

 

Member of Technical Committee of Third IEEE International Workshop on Design of Mixed mode VLSI systems and Applications, Puerto Vallarta, Mexico July 1999.

 

Reviewer for:

 

IEEE Journal of Solid State Circuits

 

IEEE Transactions on VLSI

 

IEEE Transactions on Circuits and Systems

 

IEEE Transactions on CAD

 

IEE Electronics Letters

 

IEE Proceedings, part G

 

IEEE International Symposium on Circuits and Systems: 1984-2011

MWSCAS 1983-2011

 

Member of the Analog Signal Processing Committee (secretary for two years) of the IEEE Circuits and Systems Society.

 

Member of Technical Committee IEEE-ISCAS 98.

General Chair 42nd Midwest Symposium on Circuits and Systems (IEEE sponsored)

 

Member of the Steering Committee Midwest Symposium on Circuits and Systems

 

Member of the Technical Committee of the 3rd IEEE International workshop on Mixed-Mode

 

Member of the technical committee of the 2001 IEEE International Symposium on Circuits and Systems

 

Member of Technical committee of 2002 Midwest Symposium on Circuits and Systems

 

Member of the evaluation review panel  of the Spanish Ministerium for Science and Technology November 18, 2003)

 

Member of the Promotion and Tenure Committee of the National Institute of Astrophysics Optics and Electronics, National Science Council (CONACYT)

 

External Evaluator for Promotion and Tenure, Georgia Tech, Atlanta, USA October 2006.

 

External Evaluator for Promotion and Tenure University of Calgary, Canada, December 2006

 

External evaluator for  Promotion and Tenure Texas A&M University, College Station , TX. March 2006

 

Support letters for IEEE fellow committee for five candidates in 2006

 

Ph. D. Committee member for Ph. Jose de Jesus Peregrina, INAOE, Mexico, April 18, 2006

 

Ph. D. Committee member for Ph. Luis Abraham Sanchez Gaspariano,  INAOE, Mexico, June 23, 2011

 

Ph.D. Committee member, Jeus Ezequiel Garcia, CINVESTAV, Mexico April 28, 2006

 

Ph.D. Committee member Lucia Acosta Cabanillas, University of Seville, Seville, June 11, 2010.

 

Ph.D. Committee member Trinidad Sanchez Rodriguez, University of Seville, Seville, July 25, 2011.

 

President  Ph.D. examination of Jose Maria Algute Miguel, Universida Publica de Navarra, Diciembre 4, 2012

 

Ph.D. Co-Advisor Luis Fortino Cisneros Sinencio, INAOE, Puebla, Mexico August 15, 2010.

 

External evaluator for Promotion and Tenure Georgia Tech, July 2011.

 

President  Ph.D. examination of Coro Garcia Alberdi, Universida Publica de Navarra, January 13, 2014

 

Member of  Ph.D examination committee of Cecilia Gimeno Casca, Thesis; CMOS Continuous-time adaptive equalizers for high speed serial links, University of Zaragoza, July 3, 2014

President  Ph.D. examination of Fermin Esparza Alfaro, Universida Publica de Navarra, Pamplona, Spain November 27, 2014

 

 

11. MOST IMPORTANT RESEARCH CONTRIBUTIONS

 

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CAD

 

Involved in the development of the first switched-capacitor silicon

compiler. This made use of  a novel algorithm to design circuits with arbitrary

magnitude and phase response specifications

 

Stability of Laser trimmed film resistors

 

Development of the first fundamental theory to predict the long term stability of  laser trimmed film resistors. Drifts due to aging limit the maximum practical resolution achievable with these devices As a result of this work optimal selection can now be made of the laser trim paths. This allows increased (long term) resolution of circuits using laser trimmed film resistors. As a result of his work novel digitally trimmable thin film resistor and MOS transistor structures have been developed.

 

Integrated (monolithic) filters:

 

Publication of Seminal paper on current-mode filters. The paper describes an approach for implementation of continuous-time current-mode filters. Pioneer work in the development of current-mode filters based on ladder structures

 

Introduction of various new  architectures of linear transconductance amplifiers that are characterized by high linearity and very wide gain adjustment range maintaining almost constant bandwidth. These characteristics are extremely important from the point of view of easy tunability of continuous time OTA-C filters.

 

Report of a novel scheme for high frequency filtering that allows implementation of integrated filters with foQ products very close to technology limits.

 

Introduction of a simple and effective technique to compensate transconductor excess phase. This makes possible operation of continuous time filters OTA-C at higher frequencies

 

Development of a new family of active filters (denoted OTA-Op-amp approach) that combines op-amps in closed loop and OTAs in open loop in an optimal way. These technique allows relaxing the performance requirements of both, the OTA and the op-amp

 

Analog signal processing using floating gate transistors:

 

Pioneering work in the development of novel building blocks with Multiple Input Floating Gate (MIFG) Transistors for linear and nonlinear analog signal processing blocks.

 

The first highly linear MIFG analog four quadrant multiplier that operates with a single supply voltage of only 1.5V

 

The first low-voltage (1.5V) Op-amp based on the MIFG technique.

 

The first continuous-time common-mode feedback network based on the MIFG technique

 

The first analog defuzzifier using MIFG transistors

 

Test of mixed-signal VLSI systems:

 

Introduction of a novel and efficient  method for the test of  mixed-mode VLSI systems (which has been patented). This method allows characterization of a mixed-mode VLSI system  with a simple global test and without utilization of  test vectors. It has potential to reduce enormously the the cost of testing mixed-mode VLSI circuits In this relation novel schemes for high speed dynamic current testing have been introduced.

 

Implementation of  VLSI Fuzzy processors

 

Development of various new building blocks for required in modular expandable analog neuro-fuzzy processors: the first  membership function circuits with linearly and continuously adjustable parameters, min-max circuits, multipliers, novel analog defuzzifiers.

 

VLSI analog array processors:

 

Analog FIR filters, analog median filters, analog wavelet processors

 

Novel Low-voltage techniques:

 

Conception of several innovative methods for continuous-time operation of op-amp based

circuits with  sub-volt  supply requirements close to a transistor’s threshold voltage. Among these techniques the two most relevant are: a) Low  voltage circuits based  on  static and dynamic floating voltage sources, b) Low voltage circuits  based  floating gate and quasi floating gate transistors

 

BiCMOS circuits:

 

Development of several novel analog BiCMOS  building blocks with improved

characteristics. These make optimal use of the availability of MOS and

bipolar transistors on a single silicon substrate.

 

Cellular Networks:

 

Pioneering work on the solution of partial differential equations using analog VLSI circuits. First chip for solution of Laplace (Poisson) equation  using analog VLSI circuits. This has applications in nonlinear adaptive optics. He has been also involved in the development of analog cellular neural networks.

 

Wideband amplifiers:

 

Development of a novel approach for implementation of linear wideband amplifiers with high-gain, and bandwidth close to technology limits.

12. PATENTS

 

“Integrated Circuit Fault Testing Implementing Voltage supply rail pulsing and corresponding instantaneous current response analysis,”  Patent US 5,483,170 A, January 1996, Jeffrey S. Beasley, Hema Ramammurhty, Jaime Ramirez-Angulo and Mark R. DeYong

 

Abstract

A method and apparatus for detecting faults in digital, analog, and hybrid integrated circuits is disclosed. A single test vector employing bias voltage on input used in conjunction with pulsing the power supply rails is used to allow detection of the various faults which may be present. The instantaneous rail current (i.sub.DD) is then employed for analysis of the circuit, preferably by neural network

 

 

“Digitally Configurable Analog VLSI method for real time souliution of partial differential equations,”  Patent US 6,141,676  A October 31, 2000, Jaime Ramirez-Angulo Mark R. DeYong

 

Abstract

A programmable Very Large Scale Integration (VLSI) chip and method for the analog solution of a family of partial differential equations commonly encountered in engineering and scientific computing: The Laplace equation, the diffusion or conduction equation, the wave equation, the Poission equation, the modified diffusion equation, the modified wave equation, and the wave equation with damping.

 

Abstract

“Demodulator with Post-Processing Circuit for BER improvement,” A.J. Lopez-Martin, R.G. Carvajal, I. Gil, I. Cairo, J. Aguado, L. Acosta and J. Ramirez-Angulo, Application Number 08102480.4-1233, November, 03, 2008, Patent EP2101457 A1 , Sept 6 2009

 

Abstract

Demodulator (1) for detecting digitally phase or frequency modulated signals comprising an in-phase component (i(t)) and a quadrature component (q(t)), said demodulator comprising: a linear combiner (3) for generating a plurality of 2N linear combinations of said in-phase component and said quadrature component; a plurality of amplitude limiters (40-1, 40-2, 40-3, 40-4, 40-5, 40-6, 40-7, 40-8) at the output of each of said linear combinations for providing a digital code (C0 C1 C2 C3 C4 C5 C6 C7) which represents a phase quantization sector of said linear combinations; a stage (50, 50a, 50b) for providing a decoded symbol (Data0 Data1 Data2 Data3) having M=log2(4N) bits, for comparing (53a, 53b) said decoded symbol (Data0 Data1 Data2 Data3) with a delayed symbol (Data0′ Data1′ Data2′ Data3′) and for providing a symbol (out0 out1 out2 out3) resulting from said comparison; a flip-flop (9) placed at the output of said stage (50, 50a, 50b) for selecting a most significant bit (out3) of said provided symbol (out0 out1 out2 out3) resulting from said comparison; the demodulator (1) being characterised in that it further comprises: a post-processing stage (8) located between said stage (50, 50a, 50b) and said flip-flop (9), said post-processing stage (8) being designed for compensating for errors at the output (outFF) of said flip-flop (9).

 

 

“Linear Combiner,” I. Cairo A, I. Gil, A..J. Lopez-Martin, J. Aguado, R.G. Carvajal,  L. Acosta and J. Ramirez-Angulo, Application Number 08102480.5-1237, November, 03, 2008

 

 

 

RETURN TO TOP

 

  1. Research stays

 

1994-1995  Catedra Patrimonial Conacyt , Tecnologico de Chihuahua I, Chihuahua, Mexico

 

Summer and Fall 2008 Sabbatical stay ,University of Seville

 

Summer 2001 Texas Instruments, Dallas

 

Summer 2002 Texas Instruments, Dallas

 

Summer 2004 NASA Ames Research Center, Mountain View, CA

 

Summer 2006, NASA Goddard Space Flight Center, Greenbelt, MD

 

Summer 2007, NASA Goddard Space Flight Center, Greenbelt, MD

 

Spring  2008, Violin Memory, Round Rock, TX

 

Fall 2015, INAOE Puebla, Mexico Sabbatical stay