Voltage offset compensation circuit

Details Voltage offset compensation circuit Voltage offset compensation circuit

1996-02-21

1998-09-22

Mullins, James B.

Amplifiers

With periodic switching input-output

327337, 327362, 330 51, 330107, H03F 345, H03F 134

Patent

active

058120238

ABSTRACT:
A voltage offset compensation circuit for a high gain amplifier having a fixed input voltage offset, includes sample and hold circuitry for periodically sampling the offset voltage and gain error voltage of the amplifier, and holding the sampled voltage; storage circuitry, operable between sampling periods, to store the sampled and held voltage; and further circuitry, operable during the sampling periods, to continuously maintain the output of the high gain amplifier at a value that is gain error and voltage offset compensated. The voltage offset compensation circuit may be used in sampled-data circuits, or continuous-time amplifier circuits utilizing either single-ended, or differential, inputs and either single-ended, or differential, outputs.

REFERENCES:
patent: 4282515 (1981-08-01), Patterson, III
patent: 4322687 (1982-03-01), Dwarakanath et al.
patent: 4438354 (1984-03-01), Haque et al.
patent: 4439693 (1984-03-01), Lucas et al.
patent: 4962325 (1990-10-01), Miller et al.

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