Integral-type small signal input circuit

Details Integral-type small signal input circuit Integral-type small signal input circuit

1984-02-08

1986-03-25

Zazworsky, John

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307353, 307491, 328151, H03K 501

Patent

active

045786461

ABSTRACT:
An integral-type small signal input circuit having a Miller integrator is adapted to perform cyclically an integrating operation, a resetting operation and an input offset current compensating operation. An input offset current compensation circuit which forms a feedback circuit of the amplifier in the Miller integrator is arranged to supply a compensation current to the amplifier for canceling the input offset current during the compensating operation and to supply the held compensation current to the amplifier during the integrating operation. During the compensation period, a low-pass filter which blocks sinusoidal noise components in the input signal is connected to the input of the integrator so that the held compensation current is not affected by the noise components.

REFERENCES:
patent: 3516002 (1970-06-01), Hillis
patent: 4163947 (1979-08-01), Weedon
patent: 4302689 (1981-11-01), Brodie
patent: 4352070 (1982-09-01), Beauducel et al.

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