David A. Hodges

David Albert Hodges (1937–2022) was an American electrical engineer, digital telephony pioneer, and professor of electrical engineering at the University of California, Berkeley.

Hodges was elected a member of the National Academy of Engineering in 1983 for innovative contributions to integrated circuit design techniques and their application to data and signal processing.

Education and career

Hodges received his B.E.E. degree from Cornell University in 1960, and his M.S. (1961) and Ph.D. (1966) from Berkeley. From 1966-1970 he worked at Bell Laboratories in Murray Hill and Holmdel, NJ. In 1970 he joined the faculty in Electrical Engineering and Computer Sciences at UC Berkeley, where he has served as professor, department chair, and dean.

He helped establish metal–oxide–semiconductor (MOS) devices as a practical technology for telephony applications, which led to the rapid development and wide adoption of pulse-code modulation (PCM) digital telephony. The MOS mixed-signal integrated circuit, which combines analog and digital signal processing on a single chip, was developed by Hodges with Paul R. Gray at UC Berkeley in the early 1970s. In 1974, Hodges and Gray worked with R.E. Suarez to develop MOS switched capacitor (SC) circuit technology, which they used to develop the digital-to-analog converter (DAC) chip, using MOSFETs and MOS capacitors for data conversion.^[1] The silicon-gate CMOS (complementary MOS) PCM codec-filter chip, developed by Hodges and W.C. Black in 1980, has since been the industry standard for digital telephony.^[1]

Awards

Hodges is a member of the National Academy of Engineering and an IEEE Fellow. He received the 1999 ASEE Benjamin Garver Lamme Award,^[2] 1997 IEEE James H. Mulligan, Jr. Education Medal,^[3] and, with Robert W. Brodersen and Paul R. Gray, the 1983 IEEE Morris N. Liebmann Memorial Award for pioneering work on switched capacitor circuits.^[4] Received the IEEE Richard M. Emberson Award in 2017.

References

1. Allstot, David J. (2016). "Switched Capacitor Filters". In Maloberti, Franco; Davies, Anthony C. (eds.). A Short History of Circuits and Systems: From Green, Mobile, Pervasive Networking to Big Data Computing (PDF). IEEE Circuits and Systems Society. pp. 105–110. ISBN 9788793609860. Archived from the original (PDF) on 2021-09-30. Retrieved 2019-11-29.
2. "Benjamin Garver Lamme Award". American Society for Engineering Education. Archived from the original on February 13, 2011. Retrieved February 20, 2012.
3. "IEEE James H. Mulligan, Jr. Education Medal Recipients" (PDF). IEEE. Archived from the original (PDF) on June 19, 2010. Retrieved November 23, 2010.
4. "IEEE Morris N. Liebmann Memorial Award Recipients" (PDF). IEEE. Archived from the original (PDF) on March 3, 2016. Retrieved December 26, 2010.

• Berkeley biography
• California Council on Science and Technology biography