Patents by Inventor Phillip L. Brooks

Phillip L. Brooks 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).

  • Digital phase lock loop circuit
    Patent number: 4617679
    Abstract: A digital phase lock loop (PLL) circuit adaptable to a hard disk drive. The PLL operable at a high speed comprises a pulse shaper for subjecting raw data pulses from the disk drive to waveform-shaping, a phase comparator for producing a phase control pulse on the basis of the relative positions of a delayed reference clock (VCLK) pulse and each of said waveform-shaped data pulses from the shaper, and a phase shifter for generating the VCLK pulse in response to the phase control pulse.
    Type: Grant
    Filed: September 20, 1983
    Date of Patent: October 14, 1986
    Assignee: NEC Electronics U.S.A., Inc.
    Inventor: Phillip L. Brooks