Patents by Inventor Yip Sum Tsui

Yip Sum Tsui 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 compensation based on dual signal paths for voltage-mode switching regulators
    Patent number: 8217637
    Abstract: A frequency compensation method for voltage-mode switching regulators is disclosed. A lowpass filter and a bandpass filter are employed in the two signal paths into the dual inputs of PWM comparators. In one embodiment, two zeros are generated to compensate for the L-C output filter poles. Stable operation, low output voltage ripple and fast load transient response are achieved; while the power consumption of error amplifier and the area for implementing on-chip passive components are greatly reduced.
    Type: Grant
    Filed: December 30, 2008
    Date of Patent: July 10, 2012
    Assignee: The Hong Kong University of Science and Technology
    Inventors: Yip Sum Tsui, Ying Wu, Kwok Tai Philip Mok
  • FREQUENCY COMPENSATION BASED ON DUAL SIGNAL PATHS FOR VOLTAGE-MODE SWITCHING REGULATORS
    Publication number: 20090174383
    Abstract: A frequency compensation method for voltage-mode switching regulators is disclosed. A lowpass filter and a bandpass filter are employed in the two signal paths into the dual inputs of PWM comparators. In one embodiment, two zeros are generated to compensate for the L-C output filter poles. Stable operation, low output voltage ripple and fast load transient response are achieved; while the power consumption of error amplifier and the area for implementing on-chip passive components are greatly reduced.
    Type: Application
    Filed: December 30, 2008
    Publication date: July 9, 2009
    Applicant: The Hong Kong University of Science and Technology
    Inventors: Yip Sum Tsui, Ying Wu, Kwok Tai Philip Mok