Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
May 25, 2010
Patent Application Number
11795419
Date Filed
January 16, 2006
Patent Primary Examiner
Patent abstract
Indirect detection of current using a current mirror circuit is performed with good accuracy, with a small sized circuit. In a current detection circuit, a current detection current mirror circuit includes an output current transistor which supplies an output current, and a current detection transistor which supplies a detection current proportional to the output current. A compensation current mirror circuit is connected to a current supply side of the current detection current mirror circuit, so as to make a collector voltage of the output current transistor and a collector voltage of the current detection transistor equal. A current detector detects the detection current, to indirectly detect the output current.
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