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:
Mar. 30, 1999
Filed:
Jun. 27, 1996
Charles Royston Patton, III, Murrieta, CA (US);
Western Digital Corporation, Irvine, CA (US);
Abstract
A system for powering a disk drive microprocessor using the back electromotive force (BEMF) generated by the still-spinning spindle motor after host DC power fails, and for parking the heads under microprocessor control in a manner similar to that of a conventional seek. The system detects failing host computer DC power, converts the BEMF to DC, applies the DC power to the microprocessor, and moves the heads toward the parking zone under microprocessor control in accordance with a seek profile or other suitable control method of a type conventionally used for seeking. Thus, the heads travel to the parking zone at controlled velocities that minimize the travel or seek time.