An invention that enabled a revolution in digital communications at Nortel BACKGROUND IMAGE LICENSED BY GRAPHIC STOCK Miles Copeland's Switched Capacitor Terry Caves A lthough I am not familiar with Prof. Miles Copeland's total body of work, I certainly have first-hand knowledge of major portions of it. The easiest way for me to describe the impact of his work would be to relate the story of the events that lead to Nortel's interaction with Dr. Copeland. In the late 1970s Northern Telecom (later renamed Nortel) announced their vision of a "digital world" for telephone voice communications. Voice Digital Object Identifier 10.1109/MSSC.2015.2495663 Date of publication: 21 January 2016 1943-0582/16©2016IEEE IEEE SOLID-STATE CIRCUITS MAGAZINE W I N T E R 2 0 16 21