Patents by Inventor Jeffrey Chandler Doughty

Jeffrey Chandler Doughty 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).

  • Patent number: 7859542
    Abstract: A method for synchronizing two of more graphics processing units. The method includes the steps of determining whether the phase of a first timing signal of a first graphics processing unit and the phase of a second timing signal of a second graphics processing unit are synchronized, and adjusting the frequency of the first timing signal to the frequency of the second timing signal if the first timing signal and the second timing signal are not synchronized.
    Type: Grant
    Filed: December 4, 2007
    Date of Patent: December 28, 2010
    Assignee: NVIDIA Corporation
    Inventors: Ian M. Williams, Dat T. Nguyen, Jeffrey Chandler Doughty, Ralf Biermann, Kenneth Leon Adams, Jr., Andrew B. Ritger, Satish D. Salian, Fred D. Nicklisch
  • Patent number: 7483031
    Abstract: A method for synchronizing two of more graphics processing units. The method includes the steps of determining whether the phase of a first timing signal of a first graphics processing unit and the phase of a second timing signal of a second graphics processing unit are synchronized, and adjusting the frequency of the first timing signal to the frequency of the second timing signal if the first timing signal and the second timing signal are not synchronized.
    Type: Grant
    Filed: December 8, 2003
    Date of Patent: January 27, 2009
    Assignee: NVIDIA Corporation
    Inventors: Ian M. Williams, Dat T. Nguyen, Jeffrey Chandler Doughty, Ralf Biermann, Kenneth Leon Adams, Jr., Andrew B. Ritger, Satish D. Salian, Fred D. Nicklisch
  • Patent number: 7120816
    Abstract: A method for testing synchronization between a first graphics processing unit coupled to a second graphics processing unit. The method includes detecting whether an incoming synchronization signal has been received, determining whether the incoming synchronization signal is received from one of the first graphics processing unit, the second graphics processing unit and an external synchronization signal, and indicating on a control panel one of a first and second synchronization input/output ports on one of the first graphics processing unit and the second graphics processing unit as an input port and the other one of the first and second synchronization input/output ports as an output port, if the incoming synchronization signal is received from the one of the first graphics processing unit and the second graphics processing unit.
    Type: Grant
    Filed: December 5, 2003
    Date of Patent: October 10, 2006
    Assignee: NVIDIA Corporation
    Inventors: Ian M. Williams, Dat T. Nguyen, Jeffrey Chandler Doughty, Satish D. Salian
  • Publication number: 20040207618
    Abstract: A method for synchronizing two of more graphics processing units. The method includes the steps of determining whether the phase of a first timing signal of a first graphics processing unit and the phase of a second timing signal of a second graphics processing unit are synchronized, and adjusting the frequency of the first timing signal to the frequency of the second timing signal if the first timing signal and the second timing signal are not synchronized.
    Type: Application
    Filed: December 8, 2003
    Publication date: October 21, 2004
    Applicant: NVIDIA Corporation
    Inventors: Ian M. Williams, Dat T. Nguyen, Jeffrey Chandler Doughty, Ralf Biermann, Kenneth Leon Adams, Andrew B. Ritger, Satish D. Salian, Fred D. Nicklisch
  • Publication number: 20040210788
    Abstract: A method for testing synchronization between a first graphics processing unit coupled to a second graphics processing unit. The method includes detecting whether an incoming synchronization signal has been received, determining whether the incoming synchronization signal is received from one of the first graphics processing unit, the second graphics processing unit and an external synchronization signal, and indicating on a control panel one of a first and second synchronization input/output ports on one of the first graphics processing unit and the second graphics processing unit as an input port and the other one of the first and second synchronization input/output ports as an output port, if the incoming synchronization signal is received from the one of the first graphics processing unit and the second graphics processing unit.
    Type: Application
    Filed: December 5, 2003
    Publication date: October 21, 2004
    Applicant: NVIDIA Corporation
    Inventors: Ian M. Williams, Dat T. Nguyen, Jeffrey Chandler Doughty, Satish D. Salian