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:
Sep. 19, 2000
Filed:
Sep. 09, 1998
Applicant:
Inventor:
Kaneyasu Shimoda, Kawasaki, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
360 46 ; 360 65 ; 375232 ;
Abstract
A recording unit converts input data into a (1, 7) RLL code by a (1, 7) RLL encoder to record it onto a medium. A reproducing unit equalizes a regenerative signal from the medium by use of a transfer function (1+D) (1+1.5D+D.sup.2) of an equalizer 44. After the limitation to a narrow band up to a spectrum null by a lowpass filter, the reproducing unit detects data by a maximum likelihood detector and decodes original data from (1, 7) RLL code data by means of a (1, 7) RLL decoder.