Integrating fluxmeter with input current compensation to cancel

Details Integrating fluxmeter with input current compensation to cancel Integrating fluxmeter with input current compensation to cancel

1975-02-14

1976-08-31

Corcoran, Robert J.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

324130, 330 9, G01R 3302, H03F 102

Patent

active

039783995

ABSTRACT:
The integrating fluxmeter disclosed herein employs a second electronic integrator which operates during the intervals between test periods to adjust a compensating bias current, applied to the main integrator, to a value accurately canceling any residual drift. The integrating capacitor employed in this second electronic integrating circuit is of sufficient size so that the value of the compensating current does not vary significantly during a test period.

REFERENCES:
patent: 2930973 (1960-03-01), Gilbert
patent: 3070786 (1962-12-01), MacIntyre
patent: 3265979 (1966-08-01), Staunton
patent: 3448393 (1969-06-01), Rice, Jr.
patent: 3509460 (1970-04-01), Mizrahi
patent: 3518563 (1970-06-01), Ainsworth
Gordon et al.; Use of Operational Amp for Meas. Flux. Density; Amer. Jour. of Phy.; vol. 38 No. 1; Jan. 1970; pp. 94-98.
Jaeger et al.; Dynamic Zero-Correction Method Suppesses Offset; Elec., Dec. 1972; pp. 109-110.

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