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Time Varying Circuits for Radio Receiver Applications

Thursday, May 26, 2016 @ 2:00 PM - 4:00 PM

Thursday May 26th, 2016 at 2:10 p.m. Dr. Sudhakar Pamarti, Associate Professor at the University of California, will be presenting “Time Varying Circuits for Radio Receiver Applications”.

Speaker: Dr. Sudhakar Pamarti
Associate Professor, University of California, Los Angeles

Day & Time: Thursday, May 26th, 2016
2:10 p.m.

Location: Room BA 1210
Bahen Centre for Information Technology
University of Toronto, St. George Campus
40 St. George Street, Toronto, ON M5S 2E4

Contact: Dustin Dunwell

Abstract: Sharp, programmable, linear, integrated filters are enabling components for software defined and cognitive radio applications. However, they are difficult to realize: SAW and MEMS based filters are sharp and linear but not very programmable; active filters can be sharp and programmable but are not very linear; sampled charge domain filtering is sharp and programmable but the burden of the linearity is on the front end voltage-current converter. This talk descirbes an alternative approach that uses time-varying (as opposed to time-invariant) circuits to realize sharp, programmable, linear, integrated filters. The technique exploits sampling aliases to effectively realize very sharp, linear filtering prior to sampling. This talk will describe the basics of this time-varying circuit design approach and illustrates its application to radio front-ends and spectrum scanners. Measurement results from recent prototype integrated circuits will also be presented.

Biography: Dr. Sudhakar Pamarti is an associate professor of electrical engineering at the University of California, Los Angeles. He received the Bachelor of Technology degree in electronics and electrical communication engineering from the Indian Institute of Technology, Kharagpur in 1995, and the M.S. and the Ph.D. degrees in electrical engineering from the University of California, San Diego in 1999 and 2003, respectively. Prior to joining UCLA, he has worked at Rambus Inc. (‘03-`05) and Hughes Software Systems (‘95-`97) developing high speed I/O circuits and embedded software and firmware for a wireless-in-local-loop communication system respectively. Dr. Pamarti is a recipient of the National Science Foundation’s CAREER award for developing digital signal conditioning techniques to improve analog, mixed-signal, and radio frequency integrated circuits. Dr. Pamarti serves as an Associate Editor of the IEEE Transactions on Circuits and Systems I: Regular Papers.