Magnetic encoder having a stable output property with...

Details Magnetic encoder having a stable output property with... Magnetic encoder having a stable output property with...

2008-07-15

2008-07-15

LeDynh, Bot (Department: 2862)

Electricity: measuring and testing

Magnetic

Displacement

C324S207240, C324S207250, C324S249000, C324S252000

Reexamination Certificate

active

11834062

ABSTRACT:
The present invention provides a magnetic sensor suitable for high resolution and having high reliability by achieving stable output even at the occurrence of variations in a gap between a magnetic medium and the magnetic sensor, and a magnetic encoder using the magnetic sensor. The present invention uses a magnetoresistive element having magnetoresistive properties that satisfy the inequation, H10−50<H50−90, where H10−50 represents a magnetic field required for a resistance change from ΔR×10% to ΔR×50% with respect to a maximum amount of resistance change ΔR on a magnetoresitance effect curve, and H50−90 represents a magnetic field required for a resistance change from ΔR×50% to ΔR×90%.

REFERENCES:
patent: 5561368 (1996-10-01), Dovek et al.
patent: 5637392 (1997-06-01), Sakakima et al.
patent: 2002/0039266 (2002-04-01), Saito et al.
patent: 2812042 (1998-08-01), None
patent: 3017061 (1999-12-01), None
patent: 3040750 (2000-03-01), None

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