Title:
SIGNAL AMPLIFICATION DEVICE AND SENSOR DEVICE
Document Type and Number:
WIPO Patent Application WO/2015/083604
Kind Code:
A1
Abstract:
A magnetic sensor device (1) is provided with: a magnetic sensor (10) comprising a magnetoresistance effect element; a fixed resistor (11) serially connected with the magnetoresistance effect-type magnetic sensor (10) between a high-voltage input terminal (2a) and a lower low-voltage input terminal (2b); a low-pass filter (20) for removing high-frequency components from the voltage signal (V1) at a connection part (12) between the magnetic sensor (10) and the fixed resistor (11); and a differential amplifier (30) for amplifying the difference between an output signal (V2) from the low-pass filter (20) and the voltage signal (V1) from the connection part (12). The low-pass filter (20) is an RC low-pas filter comprising a fixed resistor (21) and capacitors (22, 23).
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Inventors:
ARAKAWA HIROAKI (JP)
NISHIKAWA TAKUO (JP)
NISHIKAWA TAKUO (JP)
Application Number:
PCT/JP2014/081353
Publication Date:
June 11, 2015
Filing Date:
November 27, 2014
Export Citation:
Assignee:
KONICA MINOLTA INC (JP)
International Classes:
G01R33/09; G01D5/16; H01L43/08
Foreign References:
| JP2010223862A | 2010-10-07 | |||
| JPH08204125A | 1996-08-09 | |||
| JP2011090016A | 2011-05-06 | |||
| JP2003066127A | 2003-03-05 | |||
| JPH08220203A | 1996-08-30 |
Attorney, Agent or Firm:
KOYO INTERNATIONAL PATENT FIRM (JP)
Patent business corporation Mitsuaki international patent firm (JP)
Patent business corporation Mitsuaki international patent firm (JP)
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