Patents by Inventor Virginia Li

Virginia Li 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).

  • Current mode control DC-DC converter with single step load transient response
    Patent number: 10312805
    Abstract: A power converter using constant on-time (COT) or ramp pulse modulation (RPM) control achieves more rapid resumption of steady-state operation after a step-up load transient by extending an on-time of a switching pulse by interrupting a ramp voltage waveform that is compared with a threshold that equals a threshold voltage at the termination of a switching pulse or increasing a voltage with which the ramp voltage is compared. These techniques are applied to both single-phase and multi-phase power converters.
    Type: Grant
    Filed: March 21, 2016
    Date of Patent: June 4, 2019
    Assignee: VIRGINIA TECH INTELLECTUAL PROPERTIES, INC.
    Inventors: Virginia Li, Pei-Hsin Liu, Qiang Li, Fred C. Lee
  • Current Mode Control DC-DC Converter with Single Step Load Transient Response
    Publication number: 20160294278
    Abstract: A power converter using constant on-time (COT) or ramp pulse modulation (RPM) control achieves more rapid resumption of steady-state operation after a step-up load transient by extending an on-time of a switching pulse by interrupting a ramp voltage waveform that is compared with a threshold that equals a threshold voltage at the termination of a switching pulse or increasing a voltage with which the ramp voltage is compared. These techniques are applied to both single-phase and multi-phase power converters.
    Type: Application
    Filed: March 21, 2016
    Publication date: October 6, 2016
    Inventors: Virginia Li, Pei-Hsin Liu, Qiang Li, Fred C. Lee