Patents by Inventor Dacheng (Henry) Zhou

Dacheng (Henry) Zhou 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).

  • Data clock recovery system and method employing delayed data clock phase shifting
    Patent number: 8467489
    Abstract: A data clock recovery system is provided. A phase detector is configured to sample an input data stream by way of a data clock and a second clock to generate a first signal indicating whether a data clock lags or leads a preferred phase of the data clock in relation to an input data stream. A phase controller is configured to process the first signal to shift a phase of the second clock toward a second preferred phase, and to shift a phase of the data clock toward the first preferred phase after the shifting of the phase of the second clock.
    Type: Grant
    Filed: August 24, 2005
    Date of Patent: June 18, 2013
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Dacheng (Henry) Zhou, Barry J. Arnold
  • Data clock recovery system and method employing delayed data clock phase shifting
    Publication number: 20070047684
    Abstract: A data clock recovery system is provided. A phase detector is configured to sample an input data stream by way of a data clock and a second clock to generate a first signal indicating whether a data clock lags or leads a preferred phase of the data clock in relation to an input data stream. A phase controller is configured to process the first signal to shift a phase of the second clock toward a second preferred phase, and to shift a phase of the data clock toward the first preferred phase after the shifting of the phase of the second clock.
    Type: Application
    Filed: August 24, 2005
    Publication date: March 1, 2007
    Inventors: Dacheng (Henry) Zhou, Barry Arnold
  • Data clock recovery system and method employing phase shifting related to lag or lead time
    Publication number: 20070019773
    Abstract: A data clock recovery system is provided. A phase detector is configured to produce a first signal indicating whether a data clock lags or leads a preferred phase of the data clock in relation to an input data stream. A phase controller is configured to process the first signal to shift a phase of the data clock toward the preferred phase at a rate positively related to a length of time the data clock lags or leads the preferred phase.
    Type: Application
    Filed: July 21, 2005
    Publication date: January 25, 2007
    Inventor: Dacheng (Henry) Zhou