Patents by Inventor Tuong H. Hoang

Tuong H. Hoang 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).

  • ESD protection for inputs requiring operation beyond supply voltages
    Patent number: 5291051
    Abstract: A circuit utilizable for protecting an integrated circuit feature from electrostatic discharge is disclosed. A first bipolar transistor has its emitter connected to the IC feature and its collector connected to ground. A second bipolar transistor has its emitter connected to the IC feature and its collector connected to its base and to the base of the first bipolar transistor. A field effect transistor has its gate and drain connected to the IC feature and its body connected to its source and to the collector and base of the second bipolar transistor and to the base of the first bipolar transistor. A diode has its cathode connected to the body and the source of the field effect transistor and to the collector and base of the second bipolar transistor and to the base of the first bipolar transistor.
    Type: Grant
    Filed: September 11, 1992
    Date of Patent: March 1, 1994
    Assignee: National Semiconductor Corporation
    Inventors: Tuong H. Hoang, Mansour Izadinia