Automatic gain control circuit for radio receiver

Details Automatic gain control circuit for radio receiver Automatic gain control circuit for radio receiver

1975-01-14

1976-01-06

Libman, George H.

Telegraphy

Systems

Printing

178DIG19, 325319, 325413, 325427, 328175, 330145, H04B 116, H03G 528

Patent

active

039315762

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.

REFERENCES:
patent: 2858423 (1958-10-01), Stern
patent: 2947859 (1960-08-01), MacDonald
patent: 3012137 (1961-12-01), Riceman
patent: 3495031 (1970-02-01), Poppa
patent: 3852522 (1974-12-01), Martin
patent: 3872387 (1975-03-01), Banach

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