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:
Sep. 05, 2006
Filed:
Dec. 17, 2002
Applicant:
Sanae Takahashi, Hyogo, JP;
Inventor:
Sanae Takahashi, Hyogo, JP;
Assignees:
Renesas Technology Corp., Tokyo, JP;
Mitsubishi Electric System LSI Design Corporation, Itami, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03M 1/12 (2006.01); H04N 5/16 (2006.01);
U.S. Cl.
CPC ...
Abstract
An A/D converter updates its reference potential so that it coincides with an analog potential of a video signal. The A/D converter changes a variable voltage range of the reference potential during the same horizontal synchronizing period based upon a horizontal synchronizing signal. It is possible to correctly discriminate data superposed on the video signal even if an analog potential of the video signal considerably varies during the same horizontal synchronizing period.