D.C. Stabilization circuit for a follower-type amplifier

Details D.C. Stabilization circuit for a follower-type amplifier D.C. Stabilization circuit for a follower-type amplifier

1982-02-11

1984-07-10

Mullins, James B.

Amplifiers

Signal feedback

Amplifier in signal feedback path

330149, 330290, 330293, 330300, H03F 132

Patent

active

044595530

ABSTRACT:
A D.C. stabilization circuit is provided for a follower-type amplifier in which a correction current is generated to maintain a constant operating point of the follower device. A blocking capacitor between a signal source and the follower device permits the bias voltage to self adjust. In a preferred embodiment, the correction current is generated by a transconductance amplifier which compares the output voltage with a signal input voltage, and the correction current is connected directly to the junction of the blocking capacitor and the input of the follower device. The follower device may suitably be a field-effect transistor, a bipolar transistor, or a multi-stage follower composed of both types of devices.

REFERENCES:
patent: 3676790 (1972-07-01), Beurrier

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