Patents by Inventor Yuk Bun Chau

Yuk Bun Chau 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: 4092589
    Abstract: High-speed testing circuitry which, when coupled to one terminal of a multi-terminal electronic device, such as an integrated circuit, can either supply test stimuli signals up to a frequency of 30 MHz, receive output signals produced by the device under test in response to test stimuli signals applied by associated test circuits and compare these signals against computer predicted signals, or provide for parametric testing of the device.
    Type: Grant
    Filed: March 23, 1977
    Date of Patent: May 30, 1978
    Assignee: Fairchild Camera and Instrument Corp.
    Inventors: Yuk Bun Chau, George Niu, Rudolph Staffelbach
  • Patent number: 3976940
    Abstract: An improved testing circuit is provided which includes a pair of comparator circuits each of which is disposed for comparing two minimum threshold amplitudes of responses from a device under test, and a multiplexer circuit coupled to the outputs of the pair of comparator circuits for switching between the outputs of the pair of comparator circuits. The use of a pair of comparator circuits and a multiplexer circuit allows continuous operation of the comparators thereby providing accurate testing at high speeds of operation.The improved testing circuit of this invention also includes a skew adjustment circuit which provides for adjustment of the leading and trailing edges of a test stimuli signal from one testing circuit with respect to the leading and trailing edges of test stimuli signals from other testing circuits incorporated in a circuit testing system.
    Type: Grant
    Filed: February 25, 1975
    Date of Patent: August 24, 1976
    Assignee: Fairchild Camera and Instrument Corporation
    Inventors: Yuk Bun Chau, Willis David Stinson, Jr.