Control circuit for use with amplifier

Details Control circuit for use with amplifier Control circuit for use with amplifier

1974-04-25

1976-02-10

Safourek, Benedict V.

Amplifiers

Signal feedback

Combined with control of bias voltage of signal amplifier

330 29, 330 86, H04B 106

Patent

active

039380475

ABSTRACT:
A control circuit for use with an amplifier is disclosed which includes an amplifier circuit having an input transistor, a driving transistor and an output transistor, a negative feedback circuit consisting of a parallel connection of a capacitor and a resistor and connected between the output terminal of the output transistor and the base of the driving transistor of the amplifier circuit. It also includes a transistor having its collector and emitter connected to the negative feedback circuit, a charging and discharging circuit connected to the base of the last mentioned transistor, and a voltage source connected to the charging and discharging circuit through a switch. The operation of the amplifier circuit is controlled by instantly making the switch on through the charging and discharging circuit and the transistor.

REFERENCES:
patent: 3454892 (1969-07-01), Knowles
patent: 3737794 (1973-06-01), Kurz
patent: 3806818 (1974-04-01), Uchivama

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