Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Hajime Ito0
Date of Patent
July 7, 2009
0Patent Application Number
117237730
Date Filed
March 22, 2007
0Patent Primary Examiner
Patent abstract
A physical quantity detector includes a pressure-responsive bridge circuit that outputs a detection voltage including a voltage component corresponding to atmospheric pressure and a voltage component corresponding to a change quantity from the atmospheric pressure, a filter that eliminates the voltage component corresponding to the change quantity from the atmospheric pressure, and a variable gain unit that amplifies a voltage difference between the detection voltage outputted from the bridge circuit and the filter output voltage that is free form the change quantity from the atmospheric pressure.
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