Patents by Inventor Kok Siu Kam

Kok Siu Kam 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).

  • Adaptive slope compensation method for stabilizing a continuous conduction mode converter
    Patent number: 8149601
    Abstract: An embodiment of the invention relates to a power converter operable in a continuous conduction mode and a discontinuous conduction mode that includes a current-sense circuit element configured to produce a current-sense signal dependent on a current in an inductor of the power converter, and a difference circuit configured to produce a difference signal representing a difference of the current-sense signal and a signal representing an output characteristic of the power converter such as an output voltage. The difference signal is constrained to be above a difference signal threshold value. A slope compensation circuit is configured to produce a slope-compensated signal that includes a sum of the difference signal and the current-sense signal. A controller is configured to control a duty cycle of a power switch of the power converter in response to the slope-compensated signal by comparing the slope-compensated signal with a voltage threshold controlled by a feedback circuit.
    Type: Grant
    Filed: July 10, 2008
    Date of Patent: April 3, 2012
    Assignee: Infineon Technologies AG
    Inventors: Gong Xiaowu, Kok Siu Kam, Thian Yaw Hann
  • Integrated circuit including a controller for regulating a power supply
    Patent number: 7816902
    Abstract: An integrated circuit includes a controller configured to regulate an output of a power supply based on a first signal. The integrated circuit includes an input configured to receive the first signal and to be coupled to an external capacitor that sets an adjustable blanking time for the power supply.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: October 19, 2010
    Assignee: Infineon Technologies Austria AG
    Inventors: Gong Xiao Wu, Lim Kok Kee, Kok Siu Kam
  • NOVEL ADAPTIVE SLOPE COMPENSATION METHOD FOR STABILIZING A CONTINUOUS CONDUCTION MODE CONVERTER
    Publication number: 20100008108
    Abstract: An embodiment of the invention relates to a power converter operable in a continuous conduction mode and a discontinuous conduction mode that includes a current-sense circuit element configured to produce a current-sense signal dependent on a current in an inductor of the power converter, and a difference circuit configured to produce a difference signal representing a difference of the current-sense signal and a signal representing an output characteristic of the power converter such as an output voltage. The difference signal is constrained to be above a difference signal threshold value. A slope compensation circuit is configured to produce a slope-compensated signal comprising a sum of the difference signal and the current-sense signal. A controller is configured to control a duty cycle of a power switch of the power converter in response to the slope-compensated signal by comparing the slope-compensated signal with a voltage threshold controlled by a feedback circuit.
    Type: Application
    Filed: July 10, 2008
    Publication date: January 14, 2010
    Inventors: Gong Xiaowu, Kok Siu Kam, Thian Yaw Hann
  • INTEGRATED CIRCUIT INCLUDING A CONTROLLER FOR REGULATING A POWER SUPPLY
    Publication number: 20090109718
    Abstract: An integrated circuit includes a controller configured to regulate an output of a power supply based on a first signal. The integrated circuit includes an input configured to receive the first signal and to be coupled to an external capacitor that sets an adjustable blanking time for the power supply.
    Type: Application
    Filed: October 31, 2007
    Publication date: April 30, 2009
    Applicant: Infineon Technologies Austria AG
    Inventors: GONG Xiao Wu, Lim Kok Kee, Kok Siu Kam