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. 08, 2015
Filed:
Dec. 20, 2013
Lsi Corporation, San Jose, CA (US);
AVAGO TECHNOLOGIES GENERAL IP (SINGAPORE) PTE. LTD., Singapore, SG;
Abstract
A servo system includes an equalizer circuit operable to filter digital servo data samples according to filter tap coefficients to yield equalized data, a detector circuit operable to apply a data detection algorithm to the equalized data to yield hard decisions, a convolution circuit operable to yield ideal digital data based on the hard decisions and on target values, a subtraction circuit operable to subtract the ideal digital data from the equalized data to yield an adaptation error signal, an error gradient calculator operable calculate an error gradient signal based at least in part on the adaptation error signal, and a tap adaptation circuit operable to calculate values of the filter tap coefficients based on the error gradient signal.