Patents by Inventor William J. Hulka

William J. Hulka 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: 5408133
    Abstract: An apparatus for providing an EEPROM programming signal, comprises a charge pump circuit for receiving a programming input signal on a programming input line and for charging up a gate drive voltage signal in response to a rising edge of the programming input signal. A transistor that includes a gate coupled to the gate drive signal couples the programming input line to a programming output line, which is coupled to an EEPROM. A ramp control circuit including (i) a capacitor and (ii) a transistor controlling the flow of current through the capacitor, is coupled to the programming output line for regulating a ramp-up rate of a programming output signal on the programming output line. A ramp-down circuit is coupled to the programming input line and to the programming output line and is responsive thereto for providing a ramp-down of the programming output signal after the programming input signal goes low.
    Type: Grant
    Filed: May 3, 1993
    Date of Patent: April 18, 1995
    Assignee: Delco Electronics Corporation
    Inventors: Edward H. Honnigford, William J. Hulka