Carrier-domain magnetometers with compensation responsive to var

Details Carrier-domain magnetometers with compensation responsive to var Carrier-domain magnetometers with compensation responsive to var

1980-04-23

1982-07-13

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

Magnetometers

357 27, 307309, G01R 3302, H01L 2982

Patent

active

043397158

ABSTRACT:
A carrier-domain magnetometer (20) incorporating compensation for changes in its domain rotation frequency/magnetic flux density characteristic due to changes in operating conditions, e.g. electric bias and/or ambient temperature conditions, and/or due to ageing, compensation being obtained by providing means (24 to 28) for monitoring the ratio (F-F.sub.o)/F.sub.o where F is the domain rotation frequency when both a magnetic field biassing the magnetometer onto the linear part of its frequency/flux characteristic and a magnetic field to be sensed are applied, and F.sub.o is the domain rotation frequency when the biassing field only is applied.

REFERENCES:
patent: 3219909 (1965-11-01), Foster
patent: 4250518 (1981-02-01), Bloodworth et al.
"Digital Outproduced by Magnetic Field Sensor", 4/1977, Electronics Design, vol. 125, p. 150.
Gilbert, "Novel Magnetic Field Sensor . . . ", 11/1976, Electronics Letters, vol. 12, No. 23, pp. 608-609.
Bloodworth et al. "Novel Magnetic Field Sensor . . . ", 11/1976, Electronics Letters, vol. 12, No. 23, pp. 609-611.
Bloodworth et al., "The Carrier Domain Magnetometer", 11/1978, Solid State and Electronic Devices, vol. 2, No. 6, pp. 176-184.

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