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:
Apr. 23, 2002
Filed:
Jun. 16, 1999
Kenji Asano, Gifu, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
Information reproduction apparatus of the present invention is directed to realize data reproduction properly and reliably from an optical disk, including a wobble detection circuit ( ) to detect a wobble signal read out by an optical head ( ), a PLL circuit ( ) to frequency-multiply the wobble signal to generate a synchronizing signal (SS ), a delay circuit ( ) delaying a synchronizing signal (SS ) sequentially to generate a plurality of synchronizing signals (SS -SS ) of different phases, a particular pattern detection circuit ( ) to detect a particular pattern in a reproduced signal, and a switching unit ( ) to select one synchronizing signal having a phase difference preset by a preset circuit ( ) with respect to a detected particular pattern and supplying the selected synchronizing signal to a laser drive circuit ( ) and to a signal demodulation circuit ( ).