MAGNETIC SENSOR - ALPS ELECTRIC CO LTD

Title:

MAGNETIC SENSOR

Document Type and Number:

WIPO Patent Application WO/2008/012959

Kind Code:

A1

Abstract:

[PROBLEMS] To provide a magnetic sensor employing a magnetoresiistive element and capable of performing bipolar operation stably regardless of the polarity of external magnetic field. [MEANS FOR SOLVING PROBLEMS] First magnetoresiistive elements (10, 11) have a resistance R variable depending on variations in the field strength of external magnetic field (H1) in the positive direction, and second magnetoresiistive elements (12, 13) keep a constant resistance. The second magnetoresiistive elements (12, 13) have a resistance R variable depending on variations in the field strength of external magnetic field (H2) in the negative direction, and the first magnetoresiistive elements (10, 11) keep a constant resistance. Consequently, a magnetic sensor which can perform bipolar operation stably regardless of the polarity of external magnetic field can be obtained.

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Inventors:

SASAKI YOSHITO (JP)
SASAKI SHINICHI (JP)
SATO KIYOSHI (JP)
HASEGAWA NAOYA (JP)
UMETSU EIJI (JP)

Application Number:

PCT/JP2007/052101

Publication Date:

January 31, 2008

Filing Date:

February 07, 2007

Export Citation:

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Assignee:

ALPS ELECTRIC CO LTD (JP)
SASAKI YOSHITO (JP)
SASAKI SHINICHI (JP)
SATO KIYOSHI (JP)
HASEGAWA NAOYA (JP)
UMETSU EIJI (JP)

International Classes:

G01R33/09

Foreign References:

JP2001345498A	2001-12-14
JP2003533895A	2003-11-11
JP2003215222A	2003-07-30
JP2003060256A	2003-02-28
JPH0817311A	1996-01-19
JP2003060256A	2003-02-28

Other References: