Gain control circuits

Details Gain control circuits Gain control circuits

1975-04-25

1976-10-26

Mullins, James B.

Amplifiers

Signal feedback

Combined with control of bias voltage of signal amplifier

330 30D, 330 38M, 330145, H03G 330

Patent

active

039886921

ABSTRACT:
A gain control circuit utilizing a novel bidirectional transistor connected in shunt with a pair of outputs of a differential amplifier circuit. The novel bidirectional semiconductor device has its conduction level controlled by a variable bias source in its base circuit. By adjusting the bias source, the impedance of the bidirectional device is controlled, and hence the magnitude of the output signal developed across its terminals is controlled in gain.

REFERENCES:
patent: 3710270 (1973-01-01), Addis et al.
Bilotti, "A Distributed MOS Attenuator", Proceedings Of The IEEE, Apr. 1967, pp. 562, 563.

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