Patents by Inventor Sheng-yuan Zhang

Sheng-yuan Zhang 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).

  • Over-voltage tolerant ESD protection circuit
    Patent number: 7518844
    Abstract: An ESD protection circuit for over-voltage signal bus is disclosed that includes a diode circuit that is electrically connected to a pseudo power supply circuit. The pseudo power supply circuit includes a pseudo first power supply line coupling to an actual first power supply line having a first voltage supply level and a pseudo second power supply line coupling to an actual second power supply line having a second voltage supply level. The pseudo first power supply line and the pseudo second power supply line are clamped by an ESD clamping circuit such that the ESD protection circuit discharges voltage when an ESD event occurs, and does not interfere with the internal circuit when an over-voltage occurs.
    Type: Grant
    Filed: February 10, 2006
    Date of Patent: April 14, 2009
    Assignee: Integrated Device Technology, Inc.
    Inventors: Feng Xu, Sheng-yuan Zhang, Charles Sun