Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
July 3, 2007
Patent Application Number
11104749
Date Filed
April 13, 2005
Patent Primary Examiner
Patent abstract
An image sensor includes an array of pixels arranged in rows and columns. A reference current source provides the reference current to a transistor forming one half of a current mirror. Each column has a current source, which forms the other half of a current mirror. A switch is provided to selectively connect a resistance between ground and the transistor. When the resistance is connected, the transistor is starved of gate-source voltage, which reduces the current supplied by each current source.
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