Patents by Inventor John Xiao Zhang

John Xiao Zhang 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).

  • Apparatus and method for providing servo gain linearization for a magneto-resistive head
    Patent number: 6687079
    Abstract: A method and apparatus for generating a position information signal for the head of a hard disk drive. The disk has a track which contains a plurality of servo bursts that allow the head to be centered with the centerline of the track. The servo bursts are first sensed and an upper and a lower threshold values, based on the values of servo bursts, are generated. A position error signal based on the upper and lower threshold and the values of the servo bursts are generated and stored in a memory device.
    Type: Grant
    Filed: October 8, 1999
    Date of Patent: February 3, 2004
    Assignee: Samsung Electronics Co., LTD
    Inventor: John Xiao Zhang