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:
Nov. 23, 1999
Filed:
Mar. 21, 1997
Applicant:
Inventors:
Richard T Behrens, Lafayette, CO (US);
Trent O Dudley, Littleton, CO (US);
Neal Glover, Broomfield, CO (US);
David R Welland, Austin, TX (US);
Assignee:
Cirrus Logic, Inc., Fremont, CA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ; G11B / ;
U.S. Cl.
CPC ...
360 46 ; 360 48 ; 360 51 ; 360 65 ;
Abstract
A synchronous read channel is disclosed which samples an analog read signal from a magnetic read head positioned over a magnetic disk medium, computes a DC offset in the sample values in real time, and subtracts the DC offset from the read signal. This attenuates the deleterious affect a DC offset has on the detection algorithm used to detect the recorded data, such as the Viterbi detection algorithm.