Magnetoresistive displacement sensor and signal processing...

Details Magnetoresistive displacement sensor and signal processing... Magnetoresistive displacement sensor and signal processing...

H - Electricity

04

R

340/135.6

H04R 15/00 (2006.01) G01D 5/16 (2006.01) G01D 5/245 (2006.01)

Patent

CA 1140234

SO1242 ABSTRACT OF THE DISCLOSURE A magnetoresistive displacement sensing transducer employs a plurality of sensing elements consisting of mag- netically 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.

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