Multiple output operational amplifier

Details Multiple output operational amplifier Multiple output operational amplifier

1990-03-22

1991-07-02

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330260, 330295, 330 84, H03F 345

Patent

active

050288822

ABSTRACT:
A differential operational amplifier comprises a differential input circuit that provides a differential output signal to a plurality of independent output circuits. The gains of the differential input circuit and one output circuit are set by a fixed bias source. A variable bias source controlled by an external signal determines the gain of each other output circuit so that various attenuation characteristics are obtained in the other output circuits without affecting the operating conditions of the operational amplifier. A feedback element between the output of the one output circuit and the differential input circuit assures gain stability.

REFERENCES:
patent: 4301420 (1981-11-01), Sugawara

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