Method of position sensing utilizing giant magneto resistance el

Details Method of position sensing utilizing giant magneto resistance el Method of position sensing utilizing giant magneto resistance el

1997-07-02

1999-07-27

Strecker, Gerard

Electricity: measuring and testing

Magnetic

Displacement

32420724, 32420725, 324252, 341 15, G01B 730, G01B 714, G01R 3309

Patent

active

059296313

ABSTRACT:
A sensing method continuously scans an array of sensing elements and determines positions by converting array peak amplitude information to a time based function. An array of magneto resistive elements responds to a relatively moving magnetic field. The process of scanning the magneto resistive elements is independent of the relatively moving magnetic field. Instead of using only one voltage source to power both the driving logic circuitry and the sensing element array, a separate voltage source for powering the sensing element array is used in conjunction with the solid switch array, thus excluding unwanted noise that originates in the driving logic circuitry.

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Article "Giant Magnetoresistance of (001) Cr Magnetic Superlattices", Baibich et al, Physical Review Letters, Nov. 1988, pp. 2472-2475.

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