Patents by Inventor Xunjun Liu

Xunjun Liu 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).

  • Soft Transition Apparatus and Method for Switching Power Converters
    Publication number: 20130063982
    Abstract: An embodiment apparatus comprises a secondary synchronous rectifier and a secondary gate drive controller. The secondary gate drive controller coupled to a transformer winding comprises a secondary synchronous rectifier soft start signal generator configured to generate a plurality of soft start pulses, a pulse width modulation generator configured to generate a forward switch drive signal and a freewheeling switch drive signal based upon a signal across the transformer winding and a soft transition generator configured to generate a soft start freewheeling switch drive signal by gradually releasing the freewheeling switch drive signal during a soft start process.
    Type: Application
    Filed: October 24, 2011
    Publication date: March 14, 2013
    Applicant: FutureWei Technologies, Inc.
    Inventors: Liming Ye, Hengchun Mao, Xunjun Liu