Patents by Inventor Adam T. Atherton

Adam T. Atherton 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).

  • System and method for coherent frequency switching in DDS architectures
    Patent number: 7952516
    Abstract: The present invention is directed to an integrated circuit device that includes a primary signal synthesizer configured to generate a free-running first digital frequency signal and at least one secondary signal synthesizer disposed in parallel with the primary signal synthesizer and configured to generate a free-running at least one second digital frequency signal. A switch element includes a first switch input coupled to the primary signal synthesizer and at least one second switch input coupled to the at least one secondary signal synthesizer. The switch element is configured to select a switch output that provides either the free-running first digital frequency signal or the free-running at least one second digital frequency signal based on a switch control input.
    Type: Grant
    Filed: September 26, 2006
    Date of Patent: May 31, 2011
    Assignee: Lockheed Martin Corporation
    Inventor: Adam T. Atherton
  • Alternative method for equalizing DDS generated waveforms
    Patent number: 7787533
    Abstract: The present invention is directed to a method for equalizing a radio frequency (RF) waveform in a communication system. The method includes generating a DDS waveform at a predetermined instantaneous frequency. A digital instantaneous frequency signal corresponding to the predetermined instantaneous frequency is provided. A predetermined digital scaling factor corresponding to the predetermined instantaneous frequency is retrieved. The DDS waveform is multiplied by the digital scaling factor to yield an equalized DDS waveform.
    Type: Grant
    Filed: January 3, 2007
    Date of Patent: August 31, 2010
    Assignee: Lockheed Martin Corporation
    Inventor: Adam T. Atherton
  • Alternative Method For Equalizing DDS Generated Waveforms
    Publication number: 20080159370
    Abstract: The present invention is directed to a method for equalizing a radio frequency (RF) waveform in a communication system. The method includes generating a DDS waveform at a predetermined instantaneous frequency. A digital instantaneous frequency signal corresponding to the predetermined instantaneous frequency is provided. A predetermined digital scaling factor corresponding to the predetermined instantaneous frequency is retrieved. The DDS waveform is multiplied by the digital scaling factor to yield an equalized DDS waveform.
    Type: Application
    Filed: January 3, 2007
    Publication date: July 3, 2008
    Applicant: LOCKHEED MARTIN CORPORATION
    Inventor: Adam T. Atherton
  • System and Method for Coherent Frequency Switching in DDS Architectures
    Publication number: 20080074311
    Abstract: The present invention is directed to an integrated circuit device that includes a primary signal synthesizer configured to generate a free-running first digital frequency signal and at least one secondary signal synthesizer disposed in parallel with the primary signal synthesizer and configured to generate a free-running at least one second digital frequency signal. A switch element includes a first switch input coupled to the primary signal synthesizer and at least one second switch input coupled to the at least one secondary signal synthesizer. The switch element is configured to select a switch output that provides either the free-running first digital frequency signal or the free-running at least one second digital frequency signal based on a switch control input.
    Type: Application
    Filed: September 26, 2006
    Publication date: March 27, 2008
    Applicant: LOCKHEED MARTIN CORPORATION
    Inventor: Adam T. Atherton