Patents by Inventor Yimin Liang

Yimin Liang 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).

  • Switching power supply with optimized THD and control method thereof
    Patent number: 9083245
    Abstract: A switching power supply comprising a switching circuit and a controller. The controller comprises a preprocessing circuit, a first multiplier, a first comparing circuit and a logic circuit. The controller comprises a preprocessing circuit, a first multiplier, a first comparing circuit and a logic circuit. The preprocessing circuit generates a first multiplication input signal based on the input voltage and output voltage of the switching circuit. The first multiplier multiplies the first multiplication input signal by a second multiplication input signal and generates a first product signal. The first comparing circuit compares a current sensing signal representative of the input current with the first product signal and generates a first comparison signal. The logic circuit turns off a main switch in the switching circuit when the current sensing signal is larger than the first product signal.
    Type: Grant
    Filed: August 15, 2012
    Date of Patent: July 14, 2015
    Assignee: Chengdu Monolithic Power Systems Co., Ltd.
    Inventors: Qiming Zhao, Fei Xiong, Jianyu Xie, Xue Jiang, Yimin Liang
  • SWITCHING POWER SUPPLY WITH OPTIMIZED THD AND CONTROL METHOD THEREOF
    Publication number: 20130044521
    Abstract: A switching power supply comprising a switching circuit and a controller. The controller comprises a preprocessing circuit, a first multiplier, a first comparing circuit and a logic circuit. The controller comprises a preprocessing circuit, a first multiplier, a first comparing circuit and a logic circuit. The preprocessing circuit generates a first multiplication input signal based on the input voltage and output voltage of the switching circuit. The first multiplier multiplies the first multiplication input signal by a second multiplication input signal and generates a first product signal. The first comparing circuit compares a current sensing signal representative of the input current with the first product signal and generates a first comparison signal. The logic circuit turns off a main switch in the switching circuit when the current sensing signal is larger than the first product signal.
    Type: Application
    Filed: August 15, 2012
    Publication date: February 21, 2013
    Applicant: Chengdu Monolithic Power Systems Co., Ltd.
    Inventors: Qiming Zhao, Fei Xiong, Jianyu Xie, Xue Jiang, Yimin Liang