Tutorials / Short Courses
International Symposium on Circuits and Systems (Nuit de la litterature 2015)
Sunday, 21 May 2015
A7: Theory and Implementation of Broadband Compensation Measures For CMOS Amplifiers and Active Filters
13:30 - 17:30
Although circuit broadbanding endeavors are often seen as embodying more engineering art than science, a unified theory underpinning a systematic broadbanding design strategy can be formulated. As a complement to this formulation, computationally efficient manual analyses can also be forged to bracket the effectiveness of an adopted broadbanding strategy in advance its de-finitive computer-aided assessment. Most of the broadbanding techniques advanced by this course are applicable to voltage and power amplifiers, as well as to high performance transconductors fea-turing a linear dependence of effective transconductance on control voltages and currents. When properly phase-compensated for integrator applications, these transconductors are suitable for active biquadratic filters featuring lowpass, bandpass, and notch frequency responses.
Both open loop and closed loop broadband design strategies are developed in this course. The open loop techniques include conventional shunt peaking, second order and third order series peaking, and shunt-series peaking featuring an innovative constant resistance, lossless filter strategy capable of enhancing the 3-dB bandwidth of a common source amplifier by at least a factor of three. The closed loop broadbanding strategies feature pole-zero compensation via RC time constant source circuit degeneration, as well as a match terminated dual loop feedback methodology. All of the broadband measures proffered are couched in a form that forges a unified design theory for achieving wideband frequency responses in voltage and power amplifiers.
Many of the broadbanding techniques advanced by this course are adapted to the problem of designing high performance transconductors suitable for use in transconductor-capacitance (gm–C) filter applications. Techniques for achieving a linear dependence of effective transconductance on control voltage or current are developed, which allows for maximally convenient filter tuning and even the realization of RF-LC filters and of baseband filters capable of adapting to parametric vagaries and certain environmental uncertainties.
Instructors Contact Information
Dr. John Choma (Contact Person)
Professor of Electrical Engineering & Chair,
University Park: Mail Code: 0271
213–740–4692 [USC Office]
Dr. Edgar Sánchez-Sinencio
TI/J. Kilby Professor of Electrical Engineering
College Station, Texas 77843–3128
979-845-7498 [A&M Office]
Profs. Choma and Sánchez-Sinencio boast a collective sixty years of experience in the cir-cuit theory and electronic circuits and systems arenas. Both have been extensively involved in aca-deme and in industry with the design, implementation, and test of integrated circuit low noise amplifiers, broadband and radio frequency amplifiers capable of signal processing through the mid tens of gigahertz, active flat magnitude and flat delay filters, oscillators, mixers, and analog -to- digital converters.
John Choma earned his B.S., M.S., and Ph.D. degrees in electrical engineering from the Univer¬sity of Pittsburgh in 1963, 1965, and 1969, respectively. He is Professor and Chair of Elec-trical Engineering-Electrophysics at the University of Southern California, where he teaches under¬graduate and graduate courses in electrical circuit theory, filters, and analog integrated electron¬ics. Prof. Choma also holds a joint USC appointment as Professor of System Architecture Engineering. Prof. Choma consults in the areas of broadband analog and high-speed digital inte¬grated circuit analysis, design, and modeling.
Prior to joining the USC faculty in 1980, Prof. Choma was a senior staff design engineer in the TRW Microelectronics Center in Redondo Beach, California. His earlier positions include tech¬nical staff at Hewlett-Packard Company in Santa Clara, California, Senior Lecturer in the Gradu¬ate Division of the Department of Electrical Engineering of the California Institute of Tech-nol¬ogy, lectureships at the University of Santa Clara and the University of California at Los Ange-les, and a faculty appointment at the University of Pennsylvania.
Prof. Choma, the author or co-author of some 150 journal and conference papers and the pre¬senter of more than sixty invited short courses, seminars, and tutorials, is the 1994 recipient of the Prize Paper Award from the IEEE Microwave Theory and Techniques Society. He is the author of a Wiley Interscience text on electrical network theory and a forthcoming text on inte¬grated circuit design for communication system applications. Prof. Choma has contributed sev¬eral chapters to five edited electronic circuit texts, and he is an area editor of the IEEE/CRC Press Handbook of Circuits and Filters.
Prof. Choma has served the IEEE Circuits and Systems Society as a member of its Board of Governors, its Vice President for Administration, and its President. He has been an Associate Editor and Editor–In–Chief of the IEEE Transactions on Circuits and Systems, Part II. He is an Associate Editor of the Journal of Analog Integrated Circuits and Signal Processing and a for¬mer Regional Editor of the Journal of Circuits, Systems, and Computers.
A Fellow of the IEEE, Prof. Choma has been awarded the IEEE Millennium medal, and he has received three awards from the IEEE Circuits and Systems Society; namely, the Golden Jubilee Award, the 1999 Education Award, and the 2004 Meritorious Service Award. He is also the recipi-ent of several local and national teaching awards. Prof. Choma has served as a “Distin¬guished Lec-turer” in the IEEE Circuits and Systems Society.
Edgar Sánchez-Sinencio earned his B.S (professional degree) from the National Polytechnic of Mexico., M.S. from Stanford University, and Ph.D. degrees in electrical engineering from the Univer¬sity of Illinois at Champaign-Urbana in 1965, 1970, and 1973, respectively. He is TI J. Kilby Chair Professor of Electrical Engineering at the Texas A&M University, where he teaches under¬graduate and graduate courses in electronics, filters, RF communication circuits and advanced analog integrated circuits.
Prior to joining the TAMU faculty in 1983, Prof. Sánchez-Sinencio was the Department Head at the National Institute for Astrophysics, Optics and Electronics, Puebla, Mexico. His earlier positions include industrial post-doctoral at Nippon Electric Company in Kawasaki, Japan. Prof. Sánchez-Sinencio, the author or co-author of some 330 journal and conference papers and the pre¬senter of more than seventy invited short courses, seminars, and tutorials, is the 1995 co-recipient of the IEEE Guillemin-Cauer Award, and also co-recipient of the IEEE Darlington Award, 1997. He is a recipient of the IEEE Circuits and Systems Society Golden Jubilee Medal recipient, June 2004.
A Fellow of the IEEE , Prof. Sánchez-Sinencio has served the IEEE Circuits and Systems Society as a member of its Board of Governors, its Vice President for Publications, and as CAS Li-aison for the Region 9, Neural Networks Society and Solid State Circuits Society. He has been an Associate Editor and Editor–In–Chief of the IEEE Transactions on Circuits and Systems, Part II. He is an Associate Editor of the Journal of Analog Integrated Circuits and Signal Processing .He is a former member of IEEE Solid-State Circuits Award Committee, 2000-2008.