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Title:
MAGNETIC DETECTOR
Document Type and Number:
Japanese Patent JP3411502
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To provide a magnetic detector capable of optimizing a resistance value change and improving noise resistance by operating a giant magneto- resistance(GMR) element within a limited magnetic field range.
SOLUTION: This device is provided with a magnet 4 for generating a magnetic field, magnetic rotator arranged while keeping a prescribed gap with this magnet 4 and provided with a protruded form for changing the magnetic field generated by the magnet 4, and GMR element 3 for changing the resistance value corresponding to the magnetic field changed by this magnetic rotator. Then, the GMR element 3 is arranged at a position to impress the bias magnetic field of magnetic field strength such as 100±50 [Oe], for example, within a prescribed range to apply a high resistance change rate to the GMR element 3 while keeping the prescribed gap with the magnet.


Inventors:
Yokoya, Masahiro
Shinjo, Izuru
Hatazawa, Yasuyoshi
Hiraoka, Naoki
Application Number:
JP12782298A
Publication Date:
June 03, 2003
Filing Date:
May 11, 1998
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORP
International Classes:
G01D5/14; G01D5/16; G01R33/09; G01D5/245; (IPC1-7): G01D5/245; G01R33/09
Attorney, Agent or Firm:
曾我 道照 (外4名)