Magnetoresistive field sensor with a magnetic shield which preve

Details Magnetoresistive field sensor with a magnetic shield which preve Magnetoresistive field sensor with a magnetic shield which preve

1975-06-30

1978-06-27

Corcoran, Robert J.

Electricity: measuring and testing

Magnetic

Magnetometers

360115, 338 32R, 340365L, 365158, G01R 3302

Patent

active

040978028

ABSTRACT:
A thin film magnetoresistive sensor of NiFeCo is juxtaposed with a saturable thin film shield of more highly permeable NiFe material. The curve depicting change of resistance of the sensor as a function of applied magnetic field is flattened, permitting the sensor to provide a magnetic switch, such as a keyboard transducer, a sensor of current through wires, a magnetic bubble detector and a remote control scanning sensor in a recording head. The scanner involves a stepped arrangement for providing different levels of sensitivity for adjacent sections of the magnetoresistive sensor.

REFERENCES:
patent: 3391254 (1968-07-01), Honig
patent: 3693085 (1972-09-01), Beard
patent: 3777255 (1973-12-01), Young et al.
patent: 3840898 (1974-10-01), Bajorek et al.
patent: 3864751 (1975-02-01), Beaulieu et al.
A. Bobeck; The Magnetic Bubble; Bell Lab. Record; vol. 48, pp. 162-169; Jun.-Jul. 1970.

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