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:
Jun. 16, 2015
Filed:
Feb. 28, 2014
Applicant:
Western Digital Technologies, Inc., Irvine, CA (US);
Inventors:
Wei Guo, Fremont, CA (US);
Jianguo Zhou, Foothill Ranch, CA (US);
Yiming Chen, Riverside, CA (US);
Guoxiao Guo, Irvine, CA (US);
Jie Yu, Irvine, CA (US);
Assignee:
Western Digital Technologies, Inc., Irvine, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 21/02 (2006.01); G11B 5/55 (2006.01); G11B 20/14 (2006.01);
U.S. Cl.
CPC ...
G11B 5/5565 (2013.01); G11B 20/14 (2013.01);
Abstract
A data storage device is disclosed comprising a disk comprising data, and a head actuated over the disk. A timing signal is generated by reading the data from the disk, and a frequency generator is adjusted based on the timing signal to generate a disk locked clock substantially synchronized to a rotation speed of the disk. A free fall condition is detected based on the timing signal, and when the free fall condition is detected the head is parked.