Title: Automatic gain control circuit for radio receiver

Abstract: An intermediate frequency amplifier stage includes a tuned circuit which is shunted by a transistor utilized as an emitter follower, the emitter follower being responsive to the amplitude of a detected signal to lower the "Q" of the tuned circuit as the amplitude of the detected signal increases and to increase the "Q" of the tuned circuit as the amplitude of the detected signal decreases, thus effecting the gain of the intermediate frequency amplifier stage inversely respective the amplitude of the detected signal.

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Inventors: Csicsatka, Antal (Utica, NY, US)
String, Leslie H. (Johnstown, NY, US)

Application Number: 540814
Filing Date: 1975-01-14
Publication_date: 1976-01-06
Assignee: General Electric Company (Syracuse, NY)
Primary Class(es): 455/248.1 327/332, 330/145, 348/735, 455/245.1, 455/266
Other Classes:
US Patent Ref:

2858423	Oct, 1958	Stern	325/411.
2947859	Aug, 1960	MacDonald	325/411.
3012137	Dec, 1961	Riceman	325/408.
3495031	Feb, 1970	Poppa	178/5.
3852522	Dec, 1974	Martin	178/5.
3872387	Mar, 1975	Banach	325/427.

Other Refs:
Primary Examiner: Libman, George H.
Assistant Examiner: Bookbinder, Marc E.
Attorney: