Patents by Inventor Qingchuan Li

Qingchuan Li 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).

  • Microprocessor-controlled DC to DC converter with fault protection
    Publication number: 20030117752
    Abstract: A DC/DC converter features a programmable controller in a feedback control loop thereof. The programmable controller enables easy changes to operating parameters by reprogramming the controller's application software. Additionally, the converter features a hardware-implemented fault protection circuit which shuts down the converter's switching transistor upon controller failure.
    Type: Application
    Filed: December 20, 2001
    Publication date: June 26, 2003
    Inventors: Stephen K. Gilbert, Qingchuan Li, David L. Simpson