Patents by Inventor Kuang Ming Daniel Chang

Kuang Ming Daniel Chang 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).

  • Circuit and method for driving a junction field effect transistor
    Patent number: 7746156
    Abstract: A circuit and method for driving a field effect transistor is disclosed. A switching circuit includes a driver device having a signal input, a supply voltage input, and an output. The driver output is coupled to a JFET. A converter couples to the JFET and provides an output of the switching circuit. When enabled, a switching device couples this switching circuit output to the gate of the JFET, thus causing the JFET to be driven into conduction.
    Type: Grant
    Filed: April 16, 2007
    Date of Patent: June 29, 2010
    Assignee: QSpeed Semiconductor Inc.
    Inventors: Harold L. Massie, Kuang Ming Daniel Chang