US Patent 8009214 Individual row calibration in an image sensor

Patent 8009214 was granted and assigned to Forza Silicon on August, 2011 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

Forza Silicon

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

80092140

Patent Inventor Names

Steven Huang0

Date of Patent

August 30, 2011

Patent Application Number

117626850

Date Filed

June 13, 2007

Patent Primary Examiner

‌

Jason Whipkey

Patent abstract

A column parallel image sensor such as an active pixel sensor includes a calibration circuit for the readout circuit within the active pixel sensor. The calibration circuit produces a value that is stored and used to offset any noise in the A/D converter. The calibration is carried out each time that each row is read out so in effect the calibration's individual for each pixel. Hence, any noise within the calibration evens out within the image, and is effectively random within the image and hence becomes less noticeable within the image.