Automatic gain control circuit

Details Automatic gain control circuit Automatic gain control circuit

1976-04-02

1977-02-01

Rolinec, R. V.

Amplifiers

Signal feedback

Combined with control of bias voltage of signal amplifier

179 1G, 330 30R, 179 15BT, H03G 330

Patent

active

040064271

ABSTRACT:
In a recording system or the like including two, left and right, channels, an automatic gain control circuit for ensuring that the characteristics of the two channels always be substantially equal to each other, wherein a variable impedance circuit comprising at least one transistor is provided in association with each of the foregoing channels; a correcting variable resistor is connected between the bases of the transistors; and a control signal source is provided which has one terminal thereof connected to the movable contact of the correcting variable resistor, the other terminal of the control signal source being grounded and connected across the correcting variable resistors through shunt resistors.

REFERENCES:
patent: 3177441 (1965-04-01), Everaars

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