Title:
MICROCOMPUTER FOR DETECTING MAGNETIC FIELD, AND METHOD FOR DETECTING MAGNETIC FIELD
Document Type and Number:
WIPO Patent Application WO/2012/014376
Kind Code:
A1
Abstract:
A microcomputer (19) for detecting a magnetic field is provided with: a magnetic field detecting element (10); a differential amplifier (11); a variable voltage circuit (13), which generates a variable reference voltage; a comparator (12), which compares output from the differential amplifier (11) with the reference voltage; a register (4B), which outputs a voltage control value to the variable voltage circuit; ROM (16), which previously stores data as a first table by associating magnetic field intensities and voltage control values with each other; and a CPU (15), which sets a voltage control value to the register (4B), and determines presence/absence of the magnetic field intensity that corresponds to the voltage control value, on the basis of the first table, and the comparison results obtained from the comparator (12).
Inventors:
KOMATSU SHIGEYUKI
TOMITA HIDEO
TOMITA HIDEO
Application Number:
PCT/JP2011/003762
Publication Date:
February 02, 2012
Filing Date:
June 30, 2011
Export Citation:
Assignee:
PANASONIC CORP (JP)
KOMATSU SHIGEYUKI
TOMITA HIDEO
KOMATSU SHIGEYUKI
TOMITA HIDEO
International Classes:
G01R33/07; H01L27/22; H01L43/06
Foreign References:
| JP2009048539A | 2009-03-05 | |||
| JPH03261869A | 1991-11-21 | |||
| JP2006098306A | 2006-04-13 | |||
| JP2006038799A | 2006-02-09 |
Attorney, Agent or Firm:
NII, Hiromori (JP)
New house Extensive 守 (JP)
New house Extensive 守 (JP)
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