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:
Oct. 12, 1999
Filed:
Nov. 07, 1997
Applicant:
Inventors:
Hisanori Kawashima, Hachioji, JP;
Mitsuru Watanabe, Hachioji, JP;
Assignee:
Konica Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
369 48 ; 369 59 ;
Abstract
An apparatus for reading information from an optical disk, comprises a rotator to rotate the optical disk, a detector to detect optical information from the optical disk and to output signals, AC coupling section to eliminate signal components lower than a predetermined cut-off frequency from the signals, a slice level signal generator to generate slice level signals from a peak value and a bottom value of the signals; and a data outputting section to obtain data outputs from the signals and the slice level signals.