He worked for Linear Technology and Analog Devices.
[1] He has written a number of books, the most popular of which is the IC Op Amp Cookbook, which has been in print since 1974.
[1][2][3] He was named a Fellow of the Audio Engineering Society in 1979 for his work on distortion in operational amplifiers.
[1] He also was named to Electronic Design’s Engineering Hall of Fame in 2002.
[3] He is highly regarded as a design engineer.