Magnetic rotary encoder system having a multi-element magnetores

Details Magnetic rotary encoder system having a multi-element magnetores Magnetic rotary encoder system having a multi-element magnetores

1987-11-04

1989-09-12

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Magnetic

Displacement

324252, 338 32R, 307309, G01N 714, G01R 3302, H01L 4308

Patent

active

048663824

ABSTRACT:
A magnetic rotary encoder system includes a magnetoresistive sensor having a magnetoresistive element array which is selectively connected to accommodate a number of different diameter encoder wheels each wheel of which contains a different number of pieces of magnetic information recorded at corresponding different wavelengths. A sensing and conditioning circuit is coupled to the magnetoresistive sensor and detects changes in resistance of the magnetoresistive elements when a magnetic field produced by a magnetic pole causes the magnetoresistive resistance to drop. Output signals are provided in quadrature to increase the resolution of the system.

REFERENCES:
patent: 4731580 (1988-03-01), Indo

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