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:
Jan. 07, 2014
Filed:
Aug. 29, 2011
Alvin J. Wang, Fremont, CA (US);
Alvin J. Wang, Fremont, CA (US);
Western Digital Technologies, Inc., Irvine, CA (US);
Abstract
A disk drive is disclosed comprising a head actuated over a disk, the head comprising a magnetoresistive (MR) read element. An analog read signal emanating from the MR read element is amplified to generate an amplified analog read signal. The amplified analog read signal is filtered in continuous-time to extract a dc component. An amplitude of the amplified analog read signal is measured in continuous-time, and an asymmetry in the amplified analog read signal is estimated in response to the dc component and the amplitude. The amplified analog read signal is modified in response to the estimated asymmetry to generate a compensated analog read signal.