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:
Feb. 19, 2013
Filed:
Oct. 02, 2009
Applicant:
Atsushi Kikugawa, Tokyo, JP;
Inventor:
Atsushi Kikugawa, Tokyo, JP;
Assignee:
Hitachi Consumer Electronics Co., Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B 20/20 (2006.01);
U.S. Cl.
CPC ...
Abstract
Analog components whose characteristics greatly differ from one another are removed as much as possible from an optical disc drive. Provided are meansfor changing the sampling frequency of a pulsed read signal to a different frequency, meansfor changing the modulation clock frequency by the same ratio as the sampling frequency, and means for automatically setting the sampling frequency changing means and the modulation clock changing means based on the channel clock.