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. 19, 2017
Filed:
Sep. 27, 2016
Applicant:
Omnivision Technologies, Inc., Santa Clara, CA (US);
Inventors:
Assignee:
OmniVision Technologies, Inc., Santa Clara, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
H04N 5/378 (2011.01); H03K 4/50 (2006.01); H03M 1/06 (2006.01); H03K 4/502 (2006.01);
U.S. Cl.
CPC ...
H04N 5/378 (2013.01); H03K 4/502 (2013.01); H03M 1/0639 (2013.01);
Abstract
Apparatuses and methods for reducing vertical fixed pattern noise in imaging systems are disclosed herein. An example apparatus may include an analog dithering circuit coupled to randomly add an offset voltage to a first reference voltage in response to a random binary signal during an analog to digital conversion operation, and a ramp generator circuit coupled to receive the first reference voltage, and provide a second reference voltage in response, wherein the randomly added offset voltage to the first reference is also present in the second reference voltage.