Detection circuit with dummy integrator to compensate for switch

Details Detection circuit with dummy integrator to compensate for switch Detection circuit with dummy integrator to compensate for switch

1992-05-18

1994-06-28

Wieder, Kenneth A.

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

324684, 73517B, 328162, G01P 1508

Patent

active

053250656

ABSTRACT:
A detection circuit for sensing small capacitive changes has been provided. The detection circuit includes a dummy integrator stage that compensates for a voltage step that results from charge injection due to an existing switch in a first integrator stage. As a result, the detection circuit is insensitive to switch injection and amplifier offset voltages.

REFERENCES:
patent: 4163947 (1979-08-01), Weedon
patent: 4211981 (1980-07-01), Lerma
patent: 4364028 (1982-12-01), Masuda et al.
patent: 4365204 (1982-12-01), Haque
patent: 4656871 (1987-04-01), Czarnocri
patent: 5028876 (1991-07-01), Caldwell
patent: 5095750 (1992-03-01), Suzuki et al.

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