Patents by Inventor Robert C. Friend

Robert C. Friend 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).

  • Switchable bus termination and address selector
    Patent number: 4920339
    Abstract: A switchable termination module for use with addressable devices on a communication bus has a terminator for each signal transmission path, a signal source, for example a switch for signalling whether termination is desired and a terminator control circuit for engaging and disengaging the terminators in response to the signal from the signal source. The control circuit has a transistor between the source of potential and the terminators to couple the terminators to the transmission paths when termination is desired. The switch which signals whether termination is desired may also be used to select the address for the device.
    Type: Grant
    Filed: January 6, 1989
    Date of Patent: April 24, 1990
    Assignee: Western Digital Corp.
    Inventors: Robert C. Friend, Charles R. Patton, III