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:
Jun. 10, 1997
Filed:
Feb. 16, 1996
Applicant:
Inventor:
Norman L Koren, Encinitas, CA (US);
Assignee:
Eastman Kodak Company, Rochester, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ; G11B / ;
U.S. Cl.
CPC ...
360 40 ; 360 65 ;
Abstract
A controlled polarity recording channel capable of resolving a d+1 run-length, same-polarity data pattern. The system includes a modulation encoder, a write equalizer, a signal channel, a read equalizer, a detector, and a modulation decoder. The read equalizer may optionally include a decision feedback equalization circuit for restoring a d.c. component of an isolated pulse. The modulation encoder and decoder operate in a (d,k) run-length limited modulation code format. Also disclosed is a method for designing a read equalizer for resolving the d+1 run-length, same-polarity data pattern upon readback in controlled polarity systems.