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:
Mar. 20, 2007
Filed:
Nov. 21, 2001
Shigekazu Minechika, Osaka, JP;
Shigekazu Minechika, Osaka, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
A disk apparatus () includes a spindle () to which a magnetooptical disk () is attached. An FCM is formed on the magnetooptical disk () along a track at intervals of a predetermined period, a laser beam having a different light amount depending on a time of an execution and an interruption of a recording process is incident upon the track. The FCM signal detection circuit () detects an FCM signal based on the laser beam reflected from the track, a comparator () compares a level of the FCM signal and a slice level, and a PLL circuit () generates a clock signal based on a comparison result by the comparator (). When a change request between an execution/interruption of the recording process is applied, a predetermined first slice level is set to the comparator () until 200 mili seconds passes since a reception of the change request. When 200 mili seconds passes, a second slice level calculated based on a peak level of the FCM signal is set to the comparator ().