Patents by Inventor Edward Chak Cheung Ho

Edward Chak Cheung Ho 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).

  • Method and apparatus for parallel in serial out transmission
    Patent number: 6563485
    Abstract: A method and apparatus for providing serial transmission of a parallel input is accomplished by a parallel input serial output transmitter that includes a shift register operably coupled to receive a parallel input and to provide data serially to a gating circuit. The gating circuit, based on the state of the data it receives, generates a drive signal which causes a switching circuit to route current from first and second current sources to a third current source over different paths to produce a serial output. A bias circuit is coupled to the switching circuit to bias the serial output to a desired level.
    Type: Grant
    Filed: April 30, 2001
    Date of Patent: May 13, 2003
    Assignee: ATI Technologies, Inc.
    Inventors: Edward Chak Cheung Ho, Nancy Ngar Sze Chan, Hugh Hin-Poon Chow
  • Method and apparatus for parallel in serial out transmission
    Publication number: 20020158833
    Abstract: A method and apparatus for providing serial transmission of a parallel input is accomplished by a parallel input serial output transmitter that includes a shift register operably coupled to receive a parallel input and to provide data serially to a gating circuit. The gating circuit, based on the state of the data it receives, generates a drive signal which causes a switching circuit to route current from first and second current sources to a third current source over different paths to produce a serial output. A bias circuit is coupled to the switching circuit to bias the serial output to a desired level.
    Type: Application
    Filed: April 30, 2001
    Publication date: October 31, 2002
    Inventors: Edward Chak Cheung Ho, Nancy Ngar Sze Chan, Hugh Hin-Poon Chow