Patents Assigned to System Genreal Corp.
  • Controller with loop impedance modulation for power converter
    Patent number: 7855899
    Abstract: A control circuit is provided to generate a mode signal at light load of the power converter. The mode signal is coupled to disable the switching signal for saving power. The impedance of an input circuit is increased in response to the mode signal. Furthermore, a soft start circuit is initiated by the mode signal when switching signal is enabled. An external capacitor associates with the impedance of the input circuit determine the off period of the switching signal.
    Type: Grant
    Filed: January 23, 2007
    Date of Patent: December 21, 2010
    Assignee: System Genreal Corp.
    Inventor: Ta-yung Yang