Amplifier circuit with offset cancel circuit

Details Amplifier circuit with offset cancel circuit Amplifier circuit with offset cancel circuit

1993-11-19

1995-08-29

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific input to output function

With compensation

327179, 330 9, 330260, H03F 108, H03G 300

Patent

active

054464056

ABSTRACT:
In an amplifier circuit with an offset cancel circuit, on the output side of a non-inversion amplifier circuit, there is connected a sampling circuit including an analog switch composed of two MOS transistors. A source-follower circuit is connected to the output terminal of the sampling circuit. The output voltage of the source-follower circuit is applied to a series resistance formed between two resistances. A connecting point between the resistances is connected to the inversion input terminal of an operational amplifier forming the non-inversion amplifier circuit and thus the divisional component of the output signal of the source-follower circuit is applied to the inversion input terminal of the operational amplifier.

REFERENCES:
patent: 4255715 (1981-03-01), Cooperman
patent: 4430622 (1984-02-01), Simoes
patent: 4578646 (1986-03-01), Maio et al.
patent: 4962328 (1990-10-01), Woss et al.
patent: 5087890 (1992-02-01), Ishiguro et al.
patent: 5229720 (1993-07-01), Nishimura

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