Patents by Inventor Philip Ray Woods

Philip Ray Woods 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).

  • Repeated servo runout error compensation in a disc drive
    Patent number: 6850385
    Abstract: An apparatus and associated method are disclosed for compensating for repeated servo runout error in a disc drive. The disc drive includes a disc on which servo information is arranged as a plurality of servo fields which define tracks on the disc. An actuator assembly is provided adjacent the disc and includes a head which accesses the servo fields and an actuator motor which moves the head relative to the disc. A servo circuit controls radial location of the head by applying current to the actuator motor in response to the servo information. The repeated servo runout error, caused by errors in the radial location of the servo fields on the disc, is compensated by the servo circuit through the use of compensation values which are stored in compensation fields of the servo fields.
    Type: Grant
    Filed: June 10, 1999
    Date of Patent: February 1, 2005
    Assignee: Seagate Technology LLC
    Inventor: Philip Ray Woods
  • Repeated servo runout error compensation in a disc drive
    Patent number: 5978169
    Abstract: An apparatus and associated method are disclosed for compensating for repeated servo runout error in a disc drive. The disc drive includes a disc on which servo information is arranged as a plurality of servo fields which define tracks on the disc. An actuator assembly is provided adjacent the disc and includes a head which accesses the servo fields and an actuator motor which moves the head relative to the disc. A servo circuit controls radial location of the head by applying current to the actuator motor in response to the servo information. The repeated servo runout error, caused by errors in the radial location of the servo fields on the disc, is compensated by the servo circuit through the use of compensation values which are stored in compensation fields of the servo fields.
    Type: Grant
    Filed: December 5, 1997
    Date of Patent: November 2, 1999
    Assignee: Seagate Technology, Inc.
    Inventor: Philip Ray Woods