Amplifier circuit

Details Amplifier circuit Amplifier circuit

1976-09-24

1977-12-20

Dahl, Lawrence J.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330288, H03F 345

Patent

active

040644634

ABSTRACT:
A circuit for compensating for the departure from its nominal value of the gain of a current mirror amplifier (CMA). This departure is caused by the presence of base current in one current path of the CMA that is not present in the other current path. The common terminal current of the CMA is sensed and a circuit responsive to this current causes a current to flow at the CMA output terminal that is essentially equal to the aforementioned base currents thereby causing the CMA gain to more closely equal its nominal value. The compensated CMA may be advantageously used in combination with a differential amplifier to reduce the offset voltage of this amplifier.

REFERENCES:
patent: 3760288 (1973-09-01), Leonard
patent: 3894290 (1975-07-01), Schoeff

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