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:
Jul. 09, 2013
Filed:
Oct. 21, 2010
Applicant:
Hiroshi Kuroiwa, Kanagawa, JP;
Inventor:
Hiroshi Kuroiwa, Kanagawa, JP;
Assignee:
Renesas Electronics Corporation, Kanagawa, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P 6/14 (2006.01);
U.S. Cl.
CPC ...
Abstract
A head of a hard disc device is retracted to a predetermined position by operating a VCM (Voice Coil Motor) driver. Trouble in a hard disc is detected and retraction is performed even if a short circuit occurs in either of the output line of a VCM driver in an input end of a high potential side or in an input end of a low potential side. A ground short circuit is detected in each side separately and different retracting methods are executed for each case.