Patents by Inventor Doug Spannring

Doug Spannring 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 for providing high speed, linear-phase interpolation
    Patent number: 7271969
    Abstract: A method and apparatus for providing high speed, linear-phase interpolation. Signals from a plurality of differential pairs are weighted to produce an output clock having a selectable linear phase variation. A controller includes a pulse generator for providing a predetermined number of pulses having a predetermined phase shift and a predetermined frequency and an interpolator for processing the predetermined number of pulses having a predetermined phase shift and a predetermined frequency to generate a clock signal that is linearly adjustable between a predetermined number of output phases.
    Type: Grant
    Filed: May 5, 2005
    Date of Patent: September 18, 2007
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Eric Carpenter, Michael Curtis, Raymond A. Richetta, Doug Spannring
  • Apparatus for providing high speed, linear-phase interpolation
    Publication number: 20060250722
    Abstract: A method and apparatus for providing high speed, linear-phase interpolation. Signals from a plurality of differential pairs are weighted to produce an output clock having a selectable linear phase variation. A controller includes a pulse generator for providing a predetermined number of pulses having a predetermined phase shift and a predetermined frequency and an interpolator for processing the predetermined number of pulses having a predetermined phase shift and a predetermined frequency to generate a clock signal that is linearly adjustable between a predetermined number of output phases.
    Type: Application
    Filed: May 5, 2005
    Publication date: November 9, 2006
    Inventors: Eric Carpenter, Michael Curtis, Raymond Richetta, Doug Spannring