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. 29, 2015
Filed:
Sep. 08, 2014
Applicant:
Western Digital Technologies, Inc., Irvine, CA (US);
Inventors:
Charles J. Calaway, Tustin, CA (US);
Wenli Yang, Oak Park, CA (US);
Ashok K. Desai, Westlake Village, CA (US);
Jinsik Kim, Irvine, CA (US);
Jianghong Ding, Ladera Ranch, CA (US);
Assignee:
Western Digital Technologies, Inc., Irvine, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 15/46 (2006.01); G11B 19/20 (2006.01); G11B 19/28 (2006.01);
U.S. Cl.
CPC ...
G11B 19/2054 (2013.01); G11B 19/28 (2013.01);
Abstract
A disk drive is disclosed comprising a head actuated over a disk, and a spindle motor operable to rotate the disk. The disk drive comprises control circuitry configured to a rotation speed of the spindle motor, generate a gain as a function of the measured rotation speed, wherein the function comprises a polynomial having a degree greater than one, and spin-up the spindle motor based on the gain.