Patents by Inventor John Chan Phan

John Chan Phan 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 improving linearity of a DAC
    Patent number: 7554471
    Abstract: A system and method for improving the linearity of a digital-to-analog converter (DAC) is provided. In one embodiment, the system comprises a digital waveform generator that generates a digital sequence associated with a desired analog waveform and a pseudo-random noise component that provides a pulse shaped band limited pseudo-random noise sequence. The system further includes a combiner configured to combine the digital sequence and the pulse shaped band limited pseudo-random noise sequence and provide the combined sequence to the DAC.
    Type: Grant
    Filed: November 1, 2006
    Date of Patent: June 30, 2009
    Assignee: Northrop Grumman Corporation
    Inventors: Kenneth Kung-Juh Tsai, John Chan Phan
  • System and method for improving linearity of a DAC
    Publication number: 20080100487
    Abstract: A system and method for improving the linearity of a digital-to-analog converter (DAC) is provided. In one embodiment, the system comprises a digital waveform generator that generates a digital sequence associated with a desired analog waveform and a pseudo-random noise component that provides a pulse shaped band limited pseudo-random noise sequence. The system further includes a combiner configured to combine the digital sequence and the pulse shaped band limited pseudo-random noise sequence and provide the combined sequence to the DAC.
    Type: Application
    Filed: November 1, 2006
    Publication date: May 1, 2008
    Inventors: Kenneth Kung-Juh Tsai, John Chan Phan