Patents by Inventor Jeffery Charles Hailey

Jeffery Charles Hailey 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).

  • Advanced spread spectrum clock generation technique for EMI reduction of multiple clock sources
    Patent number: 6647052
    Abstract: The present invention describes a method and apparatus for reducing EMI emission in a multi source electronic system. The phase of the modulated waveform is varied to minimize the number of clocks within the EMI measurement bandwidth. The phase of the modulated waveform is varied in proportion to the number of EMI generating sources in the electronic system. The spread-spectrum clock is used as reference for phase delay of the modulated waveform. The phase delay can be predetermined or dynamically programmed according to the number of the EMI sources in the electronic system.
    Type: Grant
    Filed: December 26, 2001
    Date of Patent: November 11, 2003
    Assignee: Dell Products L.P.
    Inventor: Jeffery Charles Hailey
  • Advanced spread spectrum clock generation technique for EMI reduction of multiple clock sources
    Publication number: 20030118080
    Abstract: The present invention describes a method and apparatus for reducing EMI emission in a multi source electronic system. The phase of the modulated waveform is varied to minimize the number of clocks within the EMI measurement bandwidth. The phase of the modulated waveform is varied in proportion to the number of EMI generating sources in the electronic system. The spread-spectrum clock is used as reference for phase delay of the modulated waveform. The phase delay can be predetermined or dynamically programmed according to the number of the EMI sources in the electronic system.
    Type: Application
    Filed: December 26, 2001
    Publication date: June 26, 2003
    Inventor: Jeffery Charles Hailey