Patents by Inventor Yuanchang Ren

Yuanchang Ren 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).

  • Frequency limitation method with time hysteresis used in quasi-resonant control
    Patent number: 8238123
    Abstract: A frequency limitation method used in quasi-resonant control of a switching regulator is disclosed. The switching frequency is limited through setting a minimum time limit, such as a minimum switching period or a minimum OFF time. The minimum time limit may be a first time limit or a second time limit. The minimum time limit is changed into another value if the minimum voltage point approaches the minimum time limit point, so as to eliminate the audible noise.
    Type: Grant
    Filed: June 16, 2010
    Date of Patent: August 7, 2012
    Assignee: Monolithic Power Systems, Inc.
    Inventors: Junming Zhang, Yuanchang Ren, Jin Hu, Huanyu Lu, Yang Shi
  • FREQUENCY LIMITATION METHOD WITH TIME HYSTERESIS USED IN QUASI-RESONANT CONTROL
    Publication number: 20110007526
    Abstract: A frequency limitation method used in quasi-resonant control of a switching regulator is disclosed. The switching frequency is limited through setting a minimum time limit, such as a minimum switching period or a minimum OFF time. The minimum time limit may be a first time limit or a second time limit. The minimum time limit is changed into another value if the minimum voltage point approaches the minimum time limit point, so as to eliminate the audible noise.
    Type: Application
    Filed: June 16, 2010
    Publication date: January 13, 2011
    Inventors: Junming Zhang, Yuanchang Ren, Jin Hu, Huanyu Lu, Yang Shi