Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Fu-Yang Shih0
Hsu-Yuan Chin0
Date of Patent
April 1, 2008
Patent Application Number
11477378
Date Filed
June 30, 2006
Patent Citations Received
Patent Primary Examiner
Patent abstract
An auto-range current mirror circuit has a current sensing circuit, a front and rear stage current mirrors each has an adjustable amplifying rate. The current sensing circuit presets a threshold current and has an input current of the front stage current mirror. The current sensing current compares the input current with a threshold current and then outputs a controlling signal to the front and rear stage current mirrors to adjust a suitable amplifying rate. Therefore, a bias current of the rear stage current mirror is amplified by the suitable amplifying rate to improve the quality of output current of the rear stage current mirror.
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