Position sensor having magnetic resistance effect devices for de

Details Position sensor having magnetic resistance effect devices for de Position sensor having magnetic resistance effect devices for de

1996-01-24

1999-03-23

Strecker, Gerard

Electricity: measuring and testing

Magnetic

Displacement

324252, 338 32R, G01B 714, G01R 3309, H01L 4308, G01D 518

Patent

active

058865209

ABSTRACT:
A position sensor comprising a scale structure 7 having magnetic poles positioned with a predetermined distance alternatively magnetized poles one to another, at least two magnetic sensing elements M11 and M12 having a resistance variable in response to the magnetic field of the scale structure, and external connecting terminals 14, 15, and 16 are connected for applying a voltage and for producing an output signal from the intermediate terminal. The terminals each is formed to have a width in the direction in parallel to the magnetic field being 2m times the pole width (m=1, 2, 3, . . . ) of the scale structure, thereby the terminals being prevented from the effect of resistance variation by the magnetic field to provide a position information with an increased accuracy.

REFERENCES:
patent: 4429276 (1984-01-01), Narimatsu et al.
patent: 4480248 (1984-10-01), Sudo et al.
patent: 4639807 (1987-01-01), Sekizawa et al.
patent: 4801881 (1989-01-01), Kawata

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