Recollections from Yannis´ Graduate Student Years at Berkeley

One of the greatest rewards of an academic career is the extended family of graduate students that one gets to become associated with both when they are students and later throughout their career. Yannis was one of my very first students; we started working together in the mid 70s just after I arrived at Berkeley. It was a fortuitous association for me and the integrated circuits group. Yannis worked first on the implementation of an operational amplifier in NMOS technology, a project that came to have real significance later on as MOS implementation of mixed signal functions evolved from laboratory curiosity to mainstream technology, and then later on he developed, working with Jacob Chaco, the companding version of the charge-?redistribution ADC/DAC, which became quite important commercially in digital telephone systems around the world.