Continuous mode auto-zero offset amplifier or integrator

Details Continuous mode auto-zero offset amplifier or integrator Continuous mode auto-zero offset amplifier or integrator

1988-04-04

1989-02-28

Mottola, Steven

Amplifiers

With periodic switching input-output

330 51, H03F 102, H03F 114

Patent

active

048089427

ABSTRACT:
An error signal, i.e., offset, noise or drift, is sampled in an input capacitor at an error sampling interval and held during the amplification interval. During the amplification interval, the signal is amplified offset-free. The circuit has two paths which operate alternately in such a way that the signal path is never interrupted, except for very brief intervals. Each of the two paths includes an operational amplifier, and the offset voltages of the two operational amplifiers are cancelled out automatically.

REFERENCES:
patent: 4190805 (1980-02-01), Bingham
patent: 4697152 (1987-09-01), Westwick
E. A. Goldberg, "Stabilization of Wide-Band Direct-Current Amplifiers for Zero and Gain", RCA Review, Jun., 1950, pp. 296-300.
J. A. C. Bingham, "Applications of a Direct-Transfer SC Integrator", IEEE Transactions on Circuits and Systems, vol. CAS-31, No. 4, Apr., 1984.

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