Magnetoresistive displacement sensor and signal reprocessing cir

Details Magnetoresistive displacement sensor and signal reprocessing cir Magnetoresistive displacement sensor and signal reprocessing cir

1982-04-15

1984-01-31

Groody, James J.

Electricity: measuring and testing

Magnetic

Displacement

324252, 338 32R, 34087038, G01B 714, H01L 4300

Patent

active

044292767

ABSTRACT:
A magnetoresistive displacement sensing transducer employs a plurality of sensing elements consisting of magnetically biased magnetoresistive stripes. Each sensing element is operative to produce a signal in response to linear or rotational displacement with respect to a magnetic grating. The phases of the signals from the plurality of sensing elements are relatively displaced to permit determining direction of displacement and to increase accuracy through interpolation. A signal processing circuit uses the signals from the sensing elements and optionally their sums and differences to drive a reversible counter which is thereby updated to retain a value corresponding to the position of the transducer or the magnetic grating.

REFERENCES:
patent: 3582924 (1971-06-01), Uemura et al.
patent: 3949345 (1976-04-01), Makino et al.

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