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:
Jul. 19, 1994
Filed:
Nov. 30, 1992
Applicant:
Inventor:
Satoshi Nagai, Tachikawa, JP;
Assignee:
ASACA Corporation, Tokyo, JP;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N / ; G11B / ; G11B / ;
U.S. Cl.
CPC ...
369 59 ; 369 4437 ; 360 59 ;
Abstract
There is disclosed a synchronizing signal detector for a multi-beam optical disk unit employing a semiconductor laser array as an optical head, in which detection of a synchronizing signal is performed when all-bit coincident is detected in one half or more of multi-beams or when almost all-bit coincident is detected for a beam within a small number of bits before or after the all-bit coincident in another beam. Once a first synchronizing signal of each sector is detected, synchronizing signals of the subsequent second, third, . . . blocks can be detected without fail through utilization of a flywheel signal generator