Switched capacitor amplifier circuit

Details Switched capacitor amplifier circuit Switched capacitor amplifier circuit

1995-02-21

1995-12-12

Gross, Anita Pellman

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

Unwanted signal suppression

327554, 327334, H03B 100, G02F 0000

Patent

active

054753376

ABSTRACT:
In a switched capacitor amplifier circuit of an offset cancellation type, a capacitor is arranged between a reverse input terminal of an operational-transconductance amplifier and a reference voltage. Only in an offset cancelling operation in which a first group of switches are on, the capacitor functions as a load of the amplifier. The capacitor hence does not exert any influence upon transfer of charge. With provision of the circuit, the phenomenon of oscillation is suppressed in the operation to cancel the offset voltage.

REFERENCES:
patent: 4429281 (1984-01-01), Ito
patent: 4439693 (1984-03-01), Lucas et al.
patent: 4656871 (1987-04-01), Czarnocki
patent: 4894620 (1990-01-01), Nagaraj
patent: 5331222 (1994-07-01), Lin
IEEE Journal of Solid State Circuits, vol. SC-22, No. 1, Feb '1987, pp. 104-106 Ken Martin et al.

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