Phillip Allen received his PhD in electrical engineering from the University of Kansas in 1970. He retired from the School of Electrical Engineering at Georgia Institute of Technology as Professor Emeritus in 2005. He has worked for the Lawrence Livermore Laboratory, Pacific Missile Range, Texas Instruments and consulted with numerous companies. He has taught at the University of Nevada at Reno, University of Kansas, University of California at Santa Barbara, and Texas A&M University. His technical interest include analog integrated circuit and systems design with focus on implementing low voltage and high frequency circuits and systems in standard CMOS technology. He has conducted research in frequency synthesizers, RF, IF, and baseband filters compatible with standard IC technology. He has over 60 refereed publications in the area of analog circuits and has coauthored Theory and Design of Active Filters (1980), Switched Capacitor Filters (1984), CMOS Analog Circuit Design (1987), and VLSI Design Techniques for Analog and Digital Circuits (1990). He is presently active in teaching short courses on analog IC design to professionals worldwide. Also, over the past few years, he has developed proprietary courses for specific semiconductor companies to help their analog designers more effectively and efficiently utilize their particular technologies.