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. 08, 2000
Filed:
Mar. 10, 1998
Applicant:
Inventors:
Shunji Yoshimura, Tokyo, JP;
Jumpei Kura, Tokyo, JP;
Assignee:
Sony Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G11B / ; H03L / ;
U.S. Cl.
CPC ...
327100 ; 327159 ; 327150 ; 369 59 ; 375371 ;
Abstract
A digital signal reproducing circuit which enables precise measurement of a phase difference and jitter components of reproduction signals while realizing miniaturization of the circuit is disclosed. The digital signal reproducing circuit has a phase comparator for detecting a phase difference by using sampled values before and after an edge portion of a reproduction signal from an optical disc outputted from an A/D converter, and a jitter measuring section for detecting a jitter detection signal on the basis of unevenness of the phase difference obtained by the phase comparator.