Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Junichi Nakamura0
Isao Takayanagi0
Date of Patent
June 17, 2008
0Patent Application Number
102261970
Date Filed
August 23, 2002
0Patent Citations Received
Patent Primary Examiner
Patent abstract
A method and apparatus for reducing thermally generated dark current in a CMOS imaging device is disclosed. A photodiode within the imaging device is kept zero-biased, so that the voltage is equal at both ends of the photodiode. This zero-biasing is accomplished using several different techniques, including, alternatively: a transistor operating at its sub-threshold level; a leaky diode; a short-channel MOSFET; or ramping charge injection.
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