Automatic gain control circuit

Details Automatic gain control circuit Automatic gain control circuit

1976-03-02

1977-06-28

Zazworsky, John

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

179 1VL, 307296R, 330 28, 330 29, 330145, H03K 114

Patent

active

040327990

ABSTRACT:
An automatic gain control circuit includes a first transistor whose base is supplied with an input signal and whose collector is impressed with a first source voltage through a first resistor and a second transistor whose collector is connected to the emitter of the first transistor, whose emitter is grounded and whose base is impressed with an automatic gain control voltage. The collector of the first transistor serves as an output terminal of the automatic gain control circuit. The automatic gain control circuit further includes a third transistor whose base is connected to the base of the second transistor and whose emitter is grounded and a fourth transistor whose emitter is connected to the collector of the third transistor, whose collector is connected to the base of the first transistor through a second resistor and is impressed with a second source voltage through a third resistor and whose base is connected to said collector through a fourth resistor.

REFERENCES:
patent: 3790896 (1974-02-01), Shimizu et al.
patent: 3840756 (1974-10-01), Jones
patent: 3900801 (1975-08-01), Furuno

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