Title:
MAGNETISM DETECTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2014/115765
Kind Code:
A1
Abstract:
This magnetism detection device (1) is provided with: a magnetically sensitive section (10) comprising a magnetically sensitive body (11) and a detection coil (12) wound around the periphery of the magnetically sensitive body; a pulse transmission circuit (20) that transmits a pulse current supplied to the magnetically sensitive body; a sample holding circuit (40) comprising an electronic switch (41), which turns on/off at a timing in accordance with the transmission of the pulse current, and a holding capacitor (42), which charges when the electronic switch is on; and an amplifier circuit (50) that amplifies the holding voltage held by the holding capacitor when the electronic switch is off, and outputs the result. The magnetism detection device (1) is characterized by being further provided with a buffer circuit (30) of which the input side is connected to the detection coil side and the output side is connected to the electronic switch side, and that conveys a signal voltage from the input side to the output side by generating an output signal voltage that tracks an input signal voltage comprising a pulse-shaped induced voltage generated by the detection coil.
Inventors:
HONKURA YOSHINOBU (JP)
Application Number:
PCT/JP2014/051261
Publication Date:
July 31, 2014
Filing Date:
January 22, 2014
Export Citation:
Assignee:
MAGNEDESIGN CORP (JP)
International Classes:
G01R33/02; H01L43/00
Foreign References:
| JP2010256109A | 2010-11-11 | |||
| JP2003329745A | 2003-11-19 | |||
| JP2000258517A | 2000-09-22 |
Attorney, Agent or Firm:
MORIOKA Masayuki et al. (JP)
Morioka Right εΎ€ (JP)
Morioka Right εΎ€ (JP)
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