Circuit Design Techniques for High-Speed Signal Processing in Communications Systems

TEXAS A&M UNIVERSITY Department of Electrical and Computer Engineering Col l ege St at i on, Texa s 7843-3128 TEL (409) 845-7 498 FA X (409) 845- 161 sanc hez @ec e ta m u edu ht :/ / am sc ta mu edu SEMINAR Room 227A ZEC Wednesday, October 4, 2006 3:00 p.m - 3:50 p.m Circuit Design Techniques for High-Speed Signal Processing in Communications Systems by David Hernandez-Garduno Dept of Electrical and Computer Engineering College Station, TX 77843-3128 Abstract: Signal processing is at the core of communications systems Analog integrated circuits are commonly used in wireless receivers to provide low-noise amplification, frequency translation, signal filtering, and analog to digital conversion In wireline applications, analog circuits are used for amplification, as well as equalization at high-speed data rates (1>Gbits/sec) As the first part of the research work, a common-mode feedback circuit for high-speed switchedcapacitor networks is presented and demonstrated in a 10.7MHz bandpass filter, typically used for intermediate-frequency filtering in FM receivers The second part deals with the design of a 1Gbit/sec transversal equalizer for wireline applications A third-order linear phase delay line is proposed for this implementation, as well as a high-speed summing node for broadband operation David Hernandez-Garduno was born in Mexico City, Mexico He received his Bachelor of Science degree in Electronics and Communications Engineering with honors from the Universidad Iberoamericana at Mexico City in 1998 From 1998 to 2000 he worked as an RF designer in KbTel Telecomunicaciones, Mexico In 2000 he was awarded the Fulbright-Conacyt scholarship to pursue graduate studies in the U.S He joined the Analog and Mixed Signal Center at Texas A&M University in August 2000 to pursue his Ph.D degree in Electrical Engineering During the Fall 2003 and Fall 2005, he was an intern IC designer in the Wireless Terminal Business Unit at Texas Instruments, Dallas His research interests include the design of Analog/RF and Broadband Integrated Circuits