Patents by Inventor Peter Wai

Peter Wai 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).

  • High efficiency backup-power circuits for switch-mode power supplies
    Patent number: 8754545
    Abstract: Disclosed are novel interconnections of a coupling circuit and an energy storage device which enables the storage device to provide back-up power for a switching power supply without requiring the device to store or output high voltage, and which enables full utilization of the energy stored in the device. In exemplary embodiments, the combination of the coupling circuit and the energy storage device may be coupled between the input and output of the switching power supply (e.g., between the non-ground terminals of the input and output ports of the switching power supply). The coupling circuit is configured to couple power from the energy storage device to the input of the switching power supply when the input power source is not provided to the switching power supply, and optionally to couple power from the input power source to the energy storage device when the input power source is provided.
    Type: Grant
    Filed: April 22, 2010
    Date of Patent: June 17, 2014
    Assignee: Trimble Navigation Limited
    Inventors: Peter Wai, Robert Puckette
  • High Efficiency Backup-Power Circuits for Switch-Mode Power Supplies
    Publication number: 20110260539
    Abstract: Disclosed are novel interconnections of a coupling circuit and an energy storage device which enables the storage device to provide back-up power for a switching power supply without requiring the device to store or output high voltage, and which enables full utilization of the energy stored in the device. In exemplary embodiments, the combination of the coupling circuit and the energy storage device may be coupled between the input and output of the switching power supply (e.g., between the non-ground terminals of the input and output ports of the switching power supply). The coupling circuit is configured to couple power from the energy storage device to the input of the switching power supply when the input power source is not provided to the switching power supply, and optionally to couple power from the input power source to the energy storage device when the input power source is provided.
    Type: Application
    Filed: April 22, 2010
    Publication date: October 27, 2011
    Applicant: Trimble Navigation Limited
    Inventors: Peter Wai, Robert Puckette