Patents by Inventor Brett A. Henne

Brett A. Henne has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Reduced acoustic noise during spin-up by driving a spindle motor open loop using sinusoidal signals
    Patent number: 8054022
    Abstract: A disk drive is disclosed comprising a disk, a head actuated over the disk, and a spindle motor for rotating the disk, wherein the spindle motor comprises a plurality of windings. During a spin-up operation of the disk, a sinusoidal driving signal is applied to each winding of the spindle motor for a spin-up interval, wherein during at least eighty percent of the spin-up interval the sinusoidal driving signals are applied to the windings of the spindle motor open loop.
    Type: Grant
    Filed: June 26, 2008
    Date of Patent: November 8, 2011
    Assignee: Western Digital Technologies, Inc.
    Inventors: Robert P. Ryan, Brett A. Henne, Steven Nemshick