Yannis Tsividis
Yannis P. Tsividis is Charles Batchelor Professor of Electrical Engineering. Starting with the first fully integrated MOS operational amplifier, which he demonstrated in 1976, he has done extensive work in analog and mixed-signal integrated circuits at the device, circuit, system, and computer simulation level. He and his students have been responsible for several contributions, ranging from precision device modeling and novel circuit building blocks to new techniques for analog and mixed-signal processing, self-correcting chips, switched-capacitor network theory, RF integrated circuits, mixed analog-digital VLSI computation and the creation of computer simulation programs.
More info: http://www.ee.columbia.edu/fac-bios/tsividis/faculty.html