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. 03, 1996
Filed:
Jun. 13, 1994
Masaaki Hanano, Tenri, JP;
Masaru Nomura, Tenri, JP;
Sharp Kabushiki Kaisha, , JP;
Abstract
An offset compensation apparatus for a tracking error signal in an optical recording reproduction apparatus adds or subtracts a signal, which is proportional to the intensity of a read head laser beam, to or from a tracking error signal (which indicates the difference between a track of an optical disk and a a read head laser beam spot on the optical disk) so as to cancel offsets occur in the tracking error signal that are in proportion to the intensity of the read head laser beam and, thus, compensates for the offset in the tracking error signal. Since the offset compensation signal is also indicative of the amount of laser light irradiated to the optical disk, the offset can be compensated easily and accurately with a small scale simple circuit arrangement rather than using the larger-scale and more conventional divider attenuator combination of the prior art.