Apparatus for detecting the direction of a magnetic field to sen

Details Apparatus for detecting the direction of a magnetic field to sen Apparatus for detecting the direction of a magnetic field to sen

1975-07-21

1977-10-11

Corcoran, Robert J.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

33363R, 338 32R, 324 34D, G01R 3306

Patent

active

040538290

ABSTRACT:
Apparatus for detecting the direction of a magnetic field includes a magnetoresistive device comprising an insulating substrate, first and second ferromagnetic metal film strips on the substrate for providing first and second main current conducting paths respectively perpendicular to each other, the ends of the strips being connected together to form an output terminal and having current input terminals connected to the opposed ends of the strips. A stationary bias magnet is disposed adjacent the magnetoresistive device for supplying a bias flux at a predetermined angle relative to a main current conducting path.
In one application of this apparatus, the magnetic field is supplied from, for example, a magnet, such as a rotary magnet, thereby to apply, with the bias flux, a composite flux to the magnetoresistive device. An output signal is derived from the output terminal that is a function of the direction in which the magnetic field is supplied.

REFERENCES:
patent: 3162805 (1964-12-01), Robertson
patent: 3405355 (1968-10-01), Hebbert
patent: 3546579 (1970-12-01), Paul et al.
patent: 3928836 (1975-12-01), Makino
Hebbert et al., Thin Film Magneto resistance Magnetometer, Rev. of Sci. Inst., vol. 37, No. 10, Oct. 1966, pp. 1321-1323.

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