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. 31, 1996
Filed:
Feb. 03, 1995
Hidenobu Noda, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
A tracking servo circuit in which a tracking error signal obtained when tracking servo at disc player initialization is off is captured, its center level is calculated, the calculated center level is held in a register 17, and the center level held in the register 17 is subtracted from a tracking error signal obtained when the tracking servo is on. Consequently, an offset of the tracking error signal caused by a sensitivity imbalance between tracking servo photodiodes due to their aging or the like is detected to be securely corrected, thereby enhancing playability of a disc player in which the tracking servo circuit according to the invention is used.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile