Yannis P. Tsividis is Charles Batchelor Professor of Electrical Engineering. He has been working on merging of precision analog and digital circuits on a single chip ever since he joined Columbia in 1976. He and his students are responsible for several contributions toward that goal, ranging from precision device modeling and novel circuit building blocks to new techniques for analog signal processing, self-correcting chips, switched-capacitor network theory, and the creation of computer simulation programs. This work has resulted in several patents in several countries. He is the recipient of the 1984 IEEE W.R.G Baker Best Paper Award, the 1986 European Solid-State Circuits Conference Best Paper Award, the 1998 Guillemin-Cauer Best Paper Award and co-recipient of the 1987 IEEE Circuits and Systems Society Darlington Best Paper Award. He is a Fellow of the IEEE, and has received a Golden Jubilee Medal from the IEEE Circuits and Systems Society in 2000. He has received the Great Teacher Award from the Alumni Association and the Distinguished Faculty Teaching Award from the Columbia Engineering School Alumni Association.