The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 30, 2011
Filed:
Jun. 13, 2007
Applicant:
Steven Huang, Arcadia, CA (US);
Inventor:
Steven Huang, Arcadia, CA (US);
Assignee:
Forza Silicon, Pasadena, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N 5/335 (2011.01); H03M 1/10 (2006.01); H03M 1/34 (2006.01);
U.S. Cl.
CPC ...
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.