US Patent 7238925 Column current source
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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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US Patent 07238925 Column current source US Patent 7238925 Column current source
Infobox
Patent Number
0723892500
Patent Number
723892500
Edits on 29 Apr, 2023
Golden AI
Infobox
Is a
Patent Jurisdiction
Patent Number
072389250
Date of Patent
July 3, 2007
0Patent Application Number
111047490
Date Filed
April 13, 2005
0Official Website
Patent Primary Examiner
Edits on 24 Sep, 2022
Golden AI
Infobox
Is a
Patent Jurisdiction
Patent Number
072389250
Date of Patent
July 3, 2007
0Patent Application Number
111047490
Date Filed
April 13, 2005
0Official Website
Patent Primary Examiner
Edits on 15 Jun, 2022
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US Patent 07238925 Column current source
Infobox
Is a
Patent jurisdiction
Patent number
07238925
Date of patent
July 3, 2007
Patent application number
11104749
Date Filed
April 13, 2005
Patent primary examiner
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