March 9, 2012
Interschool Lab, CEPSR 750
Hosted by: Columbia Integrated System Laboratory
Speaker: Prof. Bram Nauta (University of Twente, the Netherlands)
Software defined radios are radios which can send and receive according to many standards with one piece of hardware. This hardware can be configured by software and is preferably integrated in an IC. Challenges in this type of radio are: wide band RF operation or wide-RF band tunable operation. This means that RF filtering is relaxed and in turn this makes the robustness to interference a great challenge. In this presentation several techniques will be given to increase interference robustness. Key ideas are presented in: Avoiding voltage gain at RF, 2-step harmonic rejection technique and a translational loop feedback receiver. Also a revival of N-path filters is presented, which allow tunable, linear and low-noise high-Q filters at GHz frequencies in standard CMOS.
Bram Nauta was born in Hengelo, The Netherlands. In 1987, he received the M.Sc degree in electrical engineering from the University of Twente, Enschede, The Netherlands. In 1991, he received the Ph.D. degree from the same university on the subject of analog CMOS filters for very high frequencies. In 1991, he joined the Mixed-Signal Circuits and Systems Department of Philips Research, Eindhoven the Netherlands. In 1998, he returned to the University of Twente as a full professor to head the IC Design group. His current research interest is high-speed analog CMOS circuits. He has served as Associate Editor of IEEE Transactions on Circuits and Systems (1997-1999) and was Associate Editor (2001-2006) and later the Editor-in-Chief of IEEE Journal of Solid-State Circuits (2007-2010). He is the 2013 Chair of the technical program committee of the International Solid State Circuits Conference (ISSCC) . He is also a member of the technical program committee of the European Solid State Circuit Conference (ESSCIRC) and the Symposium on VLSI circuits. He is co-recipient of the ISSCC 2002 and 2009 "Van Vessem Outstanding Paper Award", is a distinguished lecturer of the IEEE, a member of IEEE-SSCS AdCom, and an IEEE fellow.