Title:
MAGNETISM DETECTOR
Document Type and Number:
WIPO Patent Application WO/2013/129214
Kind Code:
A1
Abstract:
A magnetism detector (11) is provided with a magnetism sensor (1) and an amplifier (2). The magnetism sensor (1) is provided with a resistance voltage divider circuit that includes a magnetoresistive element (R1) and has an input terminal (T(Vi)) via which a power source voltage is inputted to the resistance voltage divider circuit and an output terminal (T(Vo)) for outputting the divided voltage from the resistance voltage divider circuit. The amplifier includes an operational amplifier (2) providing an inverting input terminal connected to the output terminal (T(Vo)) of the magnetism sensor (1), a non-inverting input terminal connected to a standard power source (3), and an output terminal connected to the input terminal (T(Vi)) of the magnetism sensor (1). The amplifier amplifies the output voltage of the magnetism sensor (1). This configuration yields a magnetic sensing device in which fluctuation in the output voltage due to fluctuation in the source voltage is reduced.
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Inventors:
OKUDA NORIAKI (JP)
OCHIAI CHITAKA (JP)
ASAISHI KENICHI (JP)
OCHIAI CHITAKA (JP)
ASAISHI KENICHI (JP)
Application Number:
PCT/JP2013/054258
Publication Date:
September 06, 2013
Filing Date:
February 21, 2013
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
G01R33/09; H01L43/08
Foreign References:
| JPS6145922A | 1986-03-06 |
Attorney, Agent or Firm:
Kaede Patent Attorneys' Office (JP)
Patent business corporation Kaede Patent Attorneys' Office (JP)
Patent business corporation Kaede Patent Attorneys' Office (JP)
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