Patents by Inventor David V. Stephens

David V. Stephens 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).

  • Shift register connection between electrical circuits
    Patent number: 5134638
    Abstract: An electrical assembly including a digital logic circuit, an analogue processing circuit and an analogue power circuit is connected to test equipment. Test data from the equipment is supplied to the circuits via a shift register divided into three serial portions. One portion is connected between the digital circuit and the processing circuit, another portion is connected between the processing circuit and the power circuit, the final portion being connected at the output of the power circuit. The portions can isolate the circuits from each other and supply test data to the circuit under test. The test data output from the circuit is clocked along the register to its output.
    Type: Grant
    Filed: April 1, 1991
    Date of Patent: July 28, 1992
    Assignee: Smiths Industries Public Limited Company
    Inventors: David V. Stephens, Christopher M. Thomas, James C. Green, David J. Vallins