Patents by Inventor Perry Leigh Heedley

Perry Leigh Heedley 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).

  • Low spur phase-locked loop architecture
    Patent number: 7936223
    Abstract: A low spur phase-locked loop (PLL) architecture is provided. A frequency-synthesizing PLL that includes a differential Kvco gain linearization circuit with adjustable DC offset is used to reduce clock jitter. The free-running oscillation frequency of the VCO of the PLL is centered near the desired frequency using programmable loads to minimize the required control voltage range. The PLL uses a differential architecture that includes a charge pump that compensates for variations in Kvco and a LC tank oscillator with differential controlled varactor. The differential PLL architecture demonstrates that the reference spur can be well controlled to below ?80 dBc.
    Type: Grant
    Filed: September 25, 2008
    Date of Patent: May 3, 2011
    Assignee: Vintomie Networks B.V., LLC
    Inventors: James M. Little, Perry Leigh Heedley, David Vieira, Maoyou Sun
  • Low spur phase-locked loop architecture
    Publication number: 20090231046
    Abstract: A low spur phase-locked loop (PLL) architecture is provided. A frequency-synthesizing PLL that includes a differential Kvco gain linearization circuit with adjustable DC offset is used to reduce clock jitter. The free-running oscillation frequency of the VCO of the PLL is centered near the desired frequency using programmable loads to minimize the required control voltage range. The PLL uses a differential architecture that includes a charge pump that compensates for variations in Kvco and a LC tank oscillator with differential controlled varactor. The differential PLL architecture demonstrates that the reference spur can be well controlled to below ?80 dBc.
    Type: Application
    Filed: September 25, 2008
    Publication date: September 17, 2009
    Inventors: James M. Little, Perry Leigh Heedley, David Vieira, Maoyou Sun