Overdrive thermal distortion compensation for a Quinn cascomp am

Details Overdrive thermal distortion compensation for a Quinn cascomp am Overdrive thermal distortion compensation for a Quinn cascomp am

1983-02-07

1985-07-09

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330151, 330311, 330258, H03F 345, H03F 130

Patent

active

045285179

ABSTRACT:
The cascomp amplifier is modified to provide a dynamic biasing circuit which varies the bias point of the cascomp amplifier in proportion to the change in the true bias point of the main channel pair to allow full thermal V.sub.be error correction for overdrive conditions and for common-mode signals. A buffer amplifier senses the average voltage of the main channel input transistor emitters and generates a voltage proportional to this average which is added to the biasing network for the cascomp amplifier common-base amplifier transistors.

REFERENCES:
patent: 3938055 (1976-02-01), Buhler
patent: 4322688 (1982-03-01), Schlotzhauer
Buhler, O. R., "Differential Amplifier", IBM Tech. Disclosure Bull., vol. 13, No. 12, May 1971.
Temkin, Bruce M., "A Low Level Amplifier for Precision Multiplexing", Int'l Telemetering Conf., L.A., CA, USA, 9/28-30/76.

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