Stuart William Seeley [SEP] occupation
Stuart William Seeley
Stuart William Seeley (June 23, 1901 – November 4, 1978) was a noted American electrical engineer, best known for inventing the Foster-Seeley discriminator and SHORAN.
Seeley was born in Chicago, Illinois, and received his B.Sc. degree in electrical engineering from Michigan State College in 1925. From 1915-1924 he was an amateur radio experimenter and commercial operator, then worked at General Electric 1925-1926, Sparks Withington 1926-1935, and the RCA License Laboratory, starting in 1935
Foster–Seeley discriminator
The Foster–Seeley discriminator is a common type of FM detector circuit, invented in 1936 by Dudley E. Foster and Stuart William Seeley. The circuit was envisioned for automatic frequency control of receivers, but also found application in demodulating an FM signal. 
It uses a tuned RF transformer to convert frequency changes into amplitude changes. A transformer, tuned to the carrier frequency, is connected to two rectifier diodes. The circuit resembles a full-wave bridge rectifier. If the input equals the carrier frequency