Patents by Inventor Richard L. Fussell

Richard L. Fussell 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).

  • On chip noise tolerant temperature sensing circuit
    Patent number: 5213416
    Abstract: A novel on-chip temperature sensing circuit includes a differential voltage source which comprises a plurality of branches each of which is provided with temperature sensitive transistor means. The differential output from the differential voltage source is coupled to the inputs of a high gain differential amplifier and the outputs from the high gain differential amplifier are connected to a second stage differential amplifer and one of the branches of the second stage differential amplifier is coupled to a high gain transistor amplifier which is connected to an output pin on the semiconductor chip so that the signal at the output pin is a noise tolerant voltage indication of the temperature of said semiconductor chip which may be monitored during actual online operations. A hysteresis feedback may be coupled between one of the outputs of the differential amplifiers to provide a hysteresis feedback loop and rapid switching of the second differential amplifier.
    Type: Grant
    Filed: December 13, 1991
    Date of Patent: May 25, 1993
    Assignee: Unisys Corporation
    Inventors: Andrew Neely, Richard L. Fussell