Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Hiroshi Kojima0
Munehiko Ogawa0
Tomokazu Kojima0
Date of Patent
February 23, 2010
0Patent Application Number
121281770
Date Filed
May 28, 2008
0Patent Citations Received
Patent Primary Examiner
Patent abstract
In an offset fixing operational amplifier circuit, an operational amplifier circuit includes an input stage containing a first constant current source, a second constant current source, a first differential pair and a second differential pair. A bias circuit supplies a bias voltage to the operational amplifier circuit. An offset fixing circuit controls the input stage in accordance with an input voltage of the operational amplifier circuit.
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