Patents by Inventor John K. Hampton

John K. Hampton 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).

  • Programmable read only memory integrated circuit with bit-check and deprogramming modes and methods for programming and testing said circuit
    Patent number: 4301535
    Abstract: A programmable read only memory (PROM) integrated circuit is constructed with two new operating modes: a bit-check mode and a deprogramming mode. In the bit-check mode, circuitry is provided to readily determine the apparent threshold voltage of each programmable transistor within the PROM. In the deprogrammable mode, circuitry is provided to simultaneously subject all programmable transistors within the PROM to a deprogramming stress. The bit-check mode provides a rapid programming method, and the bit-check mode and deprogramming mode are utilized in conjunction with each other to provide a rapid and thorough testing method.
    Type: Grant
    Filed: July 2, 1979
    Date of Patent: November 17, 1981
    Assignee: Mostek Corporation
    Inventors: Vernon G. McKenny, John K. Hampton