Patents by Inventor George Jeffrey Bennett

George Jeffrey Bennett 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).

  • Voltage feedforward control system for a spindle motor of a disk drive
    Patent number: 5898283
    Abstract: A spindle motor of a disk drive is controlled in a switched voltage mode. A power bus supplies a voltage to the spindle motor. The power bus voltage is subject to variations while the spindle motor is being driven. An uncompensated motor voltage signal is modified to provide a compensated signal having a modified duty cycle. The modified duty cycle is inversely proportional to the variations in the power bus voltage. Commutation logic uses the compensated signal to generate commutation commands, which cause a power driver stage to energize the windings of the spindle motor.
    Type: Grant
    Filed: November 18, 1997
    Date of Patent: April 27, 1999
    Assignee: Western Digital Corporation
    Inventor: George Jeffrey Bennett
  • Control system for allowing multiple chips of a disk drive to safely assert and de-assert a reset signal on a reset line
    Patent number: 5825708
    Abstract: A disk drive includes a power driver chip, a microprocessor chip and a single reset line coupled to respective pins of the power driver and the microprocessor chip. The power driver chip includes a control circuit for inhibiting the power driver chip from de-asserting a reset signal on a reset line while the microprocessor chip is asserting the reset signal on the reset line.
    Type: Grant
    Filed: November 18, 1997
    Date of Patent: October 20, 1998
    Assignee: Western Digital Corporation
    Inventor: George Jeffrey Bennett