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:
Jun. 05, 2001
Filed:
Jun. 29, 1998
Applicant:
Inventor:
Hiroshi Tani, Kawasaki, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 7/00 ;
U.S. Cl.
CPC ...
G11B 7/00 ;
Abstract
A sector mark detecting circuit for detecting a sector mark on an optical storage medium includes a binarizing circuit which binarizes a reading signal of an optical head in accordance with a predetermined detection parameter and is capable of changing the detection parameter. A recognizing circuit is adapted to recognize a sector mark from an output of the binarizing circuit, and a control circuit is adapted to measure an optimal value of the detection parameter of the binarizing circuit and control the detection parameter of the binarizing circuit to the optimal value. A sector mark detection rate is thereby enhanced.