PHYSICAL QUANTITY SENSOR SYSTEM, AND PHYSICAL QUANTITY SENSOR DEVICE

Title:

PHYSICAL QUANTITY SENSOR SYSTEM, AND PHYSICAL QUANTITY SENSOR DEVICE

Document Type and Number:

WIPO Patent Application WO/2010/092629

Kind Code:

A1

Abstract:

A physical quantity sensor system (11) drives a physical quantity sensor (10), and detects a physical quantity signal (Dphy) from a sensor signal (Ssnc). Analog/digital conversion circuits (102m, 102s) convert a monitor signal (Smnt) and the sensor signal (Ssnc) respectively to a digital monitor signal (Dmnt) and a digital sensor signal (Dsnc). A drive control circuit (103) controls a drive signal (Sdrv) according to the digital monitor signal (Dmnt). A phase adjustment circuit (104) adjusts the phase difference between the digital monitor signal (Dmnt) and the digital sensor signal (Dsnc). A detector circuit (105) carries out multiplication of the digital sensor signal and the digital monitor signal, the phase difference between the signals being adjusted by the phase adjustment circuit (104), thereby detecting the physical quantity signal (Dphy).

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Inventors:

KAINO YOICHI
TANIGUCHI MOTONORI
INUKAI FUMIHITO

Application Number:

PCT/JP2009/002527

Publication Date:

August 19, 2010

Filing Date:

June 04, 2009

Export Citation:

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Assignee:

PANASONIC CORP (JP)
KAINO YOICHI
TANIGUCHI MOTONORI
INUKAI FUMIHITO

International Classes:

G01C19/56; G01C19/5614; G01P15/10

Foreign References:

JPH07146151A	1995-06-06
JPH07170152A	1995-07-04
JP2002188925A	2002-07-05
JP2008058212A	2008-03-13
JP2008128860A	2008-06-05
JP2005524077A	2005-08-11
JP2008014932A	2008-01-24
JP2008157925A	2008-07-10
JP2008224230A	2008-09-25
JP2001264835A	2001-09-26
JPH0933262A	1997-02-07
JP2008070229A	2008-03-27