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:
Dec. 09, 2014
Filed:
Mar. 15, 2013
Western Digital Technologies, Inc., Irvine, CA (US);
Alvin J. Wang, Fremont, CA (US);
Khoa Xuan Bui, San Jose, CA (US);
Western Digital Technologies, Inc., Irvine, CA (US);
Abstract
A disk drive is disclosed comprising a head actuated over a disk, and control circuitry operable to measure a transition response of the disk drive. A test pattern is written to the disk in order to write a plurality of substantially isolated magnetic transitions on the disk. The test pattern is read from the disk to generate a read signal, and the read signal is sampled to generate signal samples. A first plurality of the signal samples is extracted representing a first magnetic transition, and a second plurality of the signal samples is extracted representing a second magnetic transition. A transition response of the disk drive is measured in response to the first and second plurality of signal samples.