Gain stage and offset voltage elimination method

Details Gain stage and offset voltage elimination method Gain stage and offset voltage elimination method

1996-10-10

1999-03-09

Mottola, Steven

Amplifiers

With periodic switching input-output

330 51, H03F 114

Patent

active

058806300

ABSTRACT:
A gain stage and offset voltage elimination method. The gain stage includes an amplifier, condensers and a number of switches. The switches are arranged to discharge the condensers and then charge the condensors to the offset voltage during an initialize period. When an input voltage is applied to the gain stage, the condensers do not act as capacitive loads for the amplifier. The gain stage can thus more quickly charge the condensers since the charging speed is approximately equal to the slew rate of the amplifier. The period for initializing the gain stage can be shortened while minimizing the current consumed.

REFERENCES:
patent: 4393351 (1983-07-01), Gregorian et al.
patent: 4404525 (1983-09-01), Amir et al.
patent: 4565971 (1986-01-01), Brookshire
patent: 5479130 (1995-12-01), McCartney

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