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:
Aug. 26, 1997
Filed:
Mar. 14, 1996
Masashi Yamawaki, Kasugai, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A disk apparatus for reproducing pulse width modulation (PWM) data from a disk is disclosed. A first sync pattern detector compares data DTLE with a first sync pattern. A second sync pattern detector compares data DTTE with a second sync pattern. A first signal generator stops the detecting operation of the first detector when the first detector has detected the first sync pattern from the data DTLE. A second signal generator stops the detecting operation of the second detector when the second detector has detected the second sync pattern from the data DTTE. A first time check circuit restarts the detecting operation of the first detector when the first sync pattern has been detected first and the second sync pattern is not detected within a predetermined period of time. A second time check circuit restarts the detecting operation of the second detector when the second sync pattern has been detected first and the first sync pattern is not detected within a predetermined period of time.