Patents by Inventor Colin Ka Ho Chow

Colin Ka Ho Chow 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).

  • Cost effective low noise single loop synthesizer
    Patent number: 7545224
    Abstract: A low cost, low phase noise microwave synthesizer includes a DDS modulation circuit and a phase-locked loop. The DDS modulation circuit modulates the output of a DDS to a high frequency. The phase-locked loop downconverts the DDS output and locks the downconverted signal to a relatively low frequency, fixed reference.
    Type: Grant
    Filed: April 12, 2007
    Date of Patent: June 9, 2009
    Assignee: Teradyne, Inc.
    Inventors: Colin Ka Ho Chow, David E. O'Brien
  • COST EFFECTIVE LOW NOISE SINGLE LOOP SYNTHESIZER
    Publication number: 20080252384
    Abstract: A low cost, low phase noise microwave synthesizer includes a DDS modulation circuit and a phase-locked loop. The DDS modulation circuit modulates the output of a DDS to a high frequency. The phase-locked loop downconverts the DDS output and locks the downconverted signal to a relatively low frequency, fixed reference.
    Type: Application
    Filed: April 12, 2007
    Publication date: October 16, 2008
    Inventors: Colin Ka Ho Chow, David E. O'Brien