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. 01, 2014
Filed:
Mar. 04, 2013
Marvell International Ltd., Hamilton, BM;
Ravishanker Krishnamoorthy, Singapore, SG;
Foo Leng Leong, Singapore, SG;
Marvell International Ltd., Hamilton, BM;
Abstract
According to an aspect of the invention, an apparatus includes: a spindle motor; and circuitry configured to spin up the spindle motor by increasing a command voltage in small steps while monitoring a current flowing through the spindle motor. According to another aspect of the invention, a method includes: spinning up a spindle motor from a stationary state to a target speed using a voltage mode of operation for the spindle motor, wherein the spinning up includes supplying to the spindle motor a series of multiple discrete voltage levels ranging from a first voltage level to a second voltage level; and maintaining the spindle motor at the target speed.