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:
Dec. 14, 2004
Filed:
Mar. 30, 2001
Applicant:
Inventors:
Assignee:
Infineon Technologies, AG, Munich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04M 9/64 ; H04M 5/217 ;
U.S. Cl.
CPC ...
H04M 9/64 ; H04M 5/217 ;
Abstract
Method and device for the exposure-dependent noise correction in images sensor which can be addressed in lines and columns are converted into digital values and an offset voltage correction is carried out by a summer, a gain correction is carried out by a multiplier, and an exposure-dependent dark current correction is carried out by a further summer. Further, the coefficients that depend on the line number, the column number and the integration time, are determined by linear approximations. As a result, the fixed pattern noise (PFN) in CMOS image sensor can be efficiently suppressed with a relatively low outlay.