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. 10, 2013
Filed:
Jun. 08, 2011
Michael L. Mallary, Sterling, MA (US);
Donald Brunnett, Pleasanton, CA (US);
Diep L. Nguyen, Castro Valley, CA (US);
Gerardo A. Bertero, Redwood City, CA (US);
Michael L. Mallary, Sterling, MA (US);
Donald Brunnett, Pleasanton, CA (US);
Diep L. Nguyen, Castro Valley, CA (US);
Gerardo A. Bertero, Redwood City, CA (US);
Western Digital Technologies, Inc., Irvine, CA (US);
Abstract
A disk drive to load a head to a load/unload (LUL) zone of a disk is disclosed. The disk drive comprises an actuator including a head; a disk having a plurality of tracks; and a processor to control the movement of the actuator and the head relative to the disk. The processor may further: measure a back electromagnetic force (BEMF) of a spindle stator of a spindle motor after turning off the spindle motor; identify a modulation feature of the BEMF that indicates an identifiable circumferential position; command the storage the modulation feature of the BEMF; and control loading the head onto the LUL zone of the disk when the modulation feature is matched.