IEEE Solid-State Circuits Magazine - Fall 2014 - 51

state of the art. His innovations were
sometimes revolutionary. Often he prevailed, and created new design paradigms replacing the existing ones.
Yannis's research and teaching
activities have extended over a very
broad area, ranging from circuit
theory to CMOS device technology. I
did not follow his work in all these
fields, but I have often consulted his
encyclopedic book on the MOS transistor [15], and also his books on
MOS VLSI integrated circuits and on
integrated CT filters [16] [17].
Concerning his other activities,
Prof. Tsividis's mentoring of his
graduate students was also exceptional. He produced several generations of leaders in the fields of
analog and mixed-mode integrated
circuits and signal processing. I
interacted with many of his successful former students, and became
aware of their respect and admiration for their advisor.
In conclusion, I regard Dr. Tsividis's
contributions to the discipline of solid-state circuits as unique. In addition
to furthering existing fields of investigation, he proposed and advocated
completely new approaches to circuit
design. He and his talented students
were then able to translate these ideas
into practical tools for analog and
mixed-signal circuit designers. He
advanced our knowledge and design
capabilities in many important ways!

References
[1] Y. P. Tsividis, P. R. Gray, D. A. Hodges,
and J. Chacko, Jr., "A segmented u-255
law PCM voice encoder utilizing NMOS
technology," IEEE J. Solid-State Circuits,
vol. SC-11, no. 6, pp. 740-747, Dec. 1976.
[2] Y. P. Tsividis and P. R. Gray, "An integrated
NMOS operational amplifier with internal
compensation," IEEE J. Solid-State Circuits,
vol. SC-11, no. 6, pp. 748-754, Dec. 1976.
[3] Y. P. Tsividis, "Analytical and experimental evaluation of a switched- capacitor
filter and remarks on the resistor/
switched-capacitor correspondence," IEEE
Trans. Circuits Syst., vol. CAS-26, no. 2,
pp. 140-144, Feb. 1979.
[4] Y. P. Tsividis, "Analysis of switched capacitive networks," IEEE Trans. Circuits Syst., vol.
CAS-26, no. 11, pp. 935-947, Nov. 1979.
[5] S. C. Fang and Y. P. Tsividis, "Modified
nodal analysis with improved numerical methods for switched-capacitor networks," in Proc. Int. Symp. Circuits Syst.,
Houston, Texas, Apr. 1980, pp. 977-980.

Concerning his other activities, Prof. Tsividis's
mentoring of his graduate students was also
exceptional.
[6] K. Suyama, S. C. Fang, and Y. Tsividis, "Simulation methods for mixed switched-capacitor/
digital networks," IEEE J. Solid-State Circuits,
vol. SC-25, no. 6, pp. 1403-1412, Dec. 1990.
[7] M. Banu and Y. Tsividis, "An elliptic
continuous-time CMOS filter with on-chip
automatic tuning," IEEE J. Solid-State Circuits,
vol. SC-20, no. 6, pp. 1114-1121, Dec. 1985.
[8] Y. Tsividis, M. Banu, and J. F. Khoury, "Continuous-time MOSFET-C filters in VLSI," IEEE
Trans. Circuits Syst., vol. 33, no. 2, pp.
125-140, Feb. 1986 (special issue on VLSI
analog and digital signal processing) also
published jointly in the IEEE J. Solid-State
Circuits, vol. SC-21, no. 1, pp. 15-30, Feb.
1986 (invited).
[9] S. Pavan, Y. P. Tsividis, and K. Nagaraj,
"Widely programmable high-frequency
continuous-time filters in digital CMOS
technology," IEEE J. Solid-State Circuits,
vol. 35, no. 4, pp. 503-511, Apr. 2000.
[10] V. Gopinathan, Y. P. Tsividis, K.-S. Tan, and
R. K. Hester, "Design considerations for
high-frequency continuous-time filters
and implementation of an antialiasing filter for digital video," IEEE J. Solid-State Circuits, vol. 25, pp. 1368-1378, Dec. 1990.
[11] B. Schell and Y. Tsividis, "A continuoustime ADC/DSP/DAC system with no clock
and activity-dependent power dissipation," IEEE J. Solid-State Circuits, vol. 43,
no. 11, pp. 2472-2481, Nov. 2008.
[12] Y. Tsividis, V. Gopinathan, and L. Toth,
"Companding in signal processing," Electron. Lett., vol. 26, pp. 1331-1332, 1990.
[13] Y. Tsividis, "Externally linear, time-invariant systems and their application to companding signal processors," IEEE Trans.
Circuits Syst., Part II, vol. 44, no. 2, pp.
65-85, Feb. 1997.
[14] A. Klein and Y. Tsividis, "Externally linear
discrete-time systems with application to
instantaneously companding digital signal
processors," IEEE Trans. Circuits Syst. I,
vol. 58, no. 11, pp. 2718-2728, Nov. 2011.
[15] Y. Tsividis, Operation and Modeling of the
MOS Transistor. New York: McGraw-Hill,
1987.
[16] Y. Tsividis, Mixed Analog-Digital VLSI
Devices and Technology: An Introduction.
New York: McGraw-Hill, 1996.
[17] S. Pavan and Y. Tsividis, High Frequency
Continuous Time Filters in Digital CMOS
Processes. Boston: Kluwer, 2000.

About the Author
Gabor C. Temes (Gabor.Temes@
oregonstate.edu) (SM'66-F'73-LF'98)
received the undergraduate degrees
from the Technical University of
Budapest and Eötvös University, Budapest, Hungary, in 1952 and 1955,
respectively. He received the Ph.D.
degree in electrical engineering from
the University of Ottawa, ON, Canada,
in 1961, and an honorary doctorate

from the Technical University of Budapest, Budapest, Hungary, in 1991.
He held academic positions at the
Technical University of Budapest,
Stanford University, Stanford, CA,
and the University of California at
Los Angeles (UCLA). He worked in
industry at Northern Electric R&D
Laboratories (now Bell-Northern
Research), Ottawa, Canada, as well
as at Ampex Corp. He is now a Professor in the School of Electrical
Engineering and Computer Science
at Oregon State University and Distinguished Professor Emeritus at
UCLA. His recent research has dealt
with CMOS analog integrated circuits, as well as data converters.
He coedited and coauthored many
books; the most recent one is Understanding Delta-Sigma Data Converters (IEEE Press/Wiley, 2005). He also
wrote approximately 300 papers in
engineering journals and conference
proceedings.
Dr. Temes was Editor of the IEEE
Transactions on Circuit Theory and
Vice President of the IEEE Circuits
and Systems (CAS) Society. In 1968
and in 1981, he was co-winner of the
IEEE CAS Darlington Award, and in
1984 winner of the Centennial Medal
of the IEEE. He received the Andrew
Chi Prize Award of the IEEE Instrumentation and Measurement Society
in 1985, the Education Award of the
IEEE CAS Society in 1987, and the
Technical Achievement Award of the
IEEE CAS Society in 1989. He received
the IEEE Graduate Teaching Award in
1998, and the IEEE Millennium Medal
as well as the IEEE CAS Golden Jubilee Medal in 2000. He was the 2006
recipient of the IEEE Gustav Robert
Kirchhoff Award, and the 2009 IEEE
CAS Mac Valkenburg Award.

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