Second harmonic magnetic field detection circuit with means to r

Details Second harmonic magnetic field detection circuit with means to r Second harmonic magnetic field detection circuit with means to r

1976-11-11

1977-11-22

Corcoran, Robert J.

Electricity: measuring and testing

Magnetic

Magnetometers

G01R 3304

Patent

active

040597962

ABSTRACT:
A magnetic field sensing circuit using three windings on a magnetic sensor with one winding using a locally generated excitation voltage, a second winding providing an output induced by the excitation voltage and a third winding both providing external magnetic field sense signals and serving as a feedback winding. The induced excitation voltage is used to generate a signal indicative of the flux in the core for the ultimate purpose of logically switching the sense winding so as to rectify it and supply it back to the third winding as a feedback signal for counteracting the flux in the sensor due to the external field being sensed.

REFERENCES:
patent: 3218547 (1965-11-01), Ling
patent: 3944912 (1976-03-01), Angel et al.
Ling; S. C., Fluxgate Magnetometer for Space Applications; Jour. Spacecraft; vol. 1, No. 2; Mar.-Apr. 1964; pp. 175-180.

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