Patents by Inventor Saekyu Lee

Saekyu Lee 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).

  • Patent number: 10250130
    Abstract: A switched capacitor converter and a method for configuring the switched capacitor converter are disclosed. The switched capacitor converter includes a capacitance resource with a cathode and an anode and a switching matrix with a first terminal, a second terminal, a third terminal, and at least one switch configured to switch among two or more connections selected from the group consisting of a connection of the first terminal to the anode and the second terminal to the cathode and a connection of the second terminal to the anode and the third terminal to the cathode.
    Type: Grant
    Filed: March 25, 2016
    Date of Patent: April 2, 2019
    Assignee: President and Fellows of Harvard College
    Inventors: Gu-Yeon Wei, Tao Tong, David Brooks, Saekyu Lee
  • Patent number: 10199931
    Abstract: A device and method for hybrid feedback control of a switch-capacitor multi-unit voltage regulator are presented. A multi-unit switched-capacitor (SC) core includes a plurality of SC converter units, each unit with a capacitor and a plurality of switches controllable by a plurality of switching signals. Power switch drivers provide a switching signal to each SC converter unit. A secondary proactive loop circuit includes a feedback control circuit configured to control one or more of the plurality of switches. A comparator is configured to compare the regulator output voltage with a reference voltage and provide a comparator trigger signal. Ripple reduction logic is configured to receive the comparator trigger signal and provide an SC unit allocation signal. A multiplexer is configured to receive a first clock signal, a second clock signal, and the SC unit allocation signal and provide a signal to the power switch drivers.
    Type: Grant
    Filed: February 26, 2016
    Date of Patent: February 5, 2019
    Assignee: President and Fellows of Harvard College
    Inventors: Gu-Yeon Wei, Tao Tong, David Brooks, Saekyu Lee
  • Publication number: 20180069472
    Abstract: A switched capacitor converter and a method for configuring the switched capacitor converter are disclosed. The switched capacitor converter includes a capacitance resource with a cathode and an anode and a switching matrix with a first terminal, a second terminal, a third terminal, and at least one switch configured to switch among two or more connections selected from the group consisting of a connection of the first terminal to the anode and the second terminal to the cathode and a connection of the second terminal to the anode and the third terminal to the cathode.
    Type: Application
    Filed: March 25, 2016
    Publication date: March 8, 2018
    Inventors: Gu-Yeon Wei, Tao Tong, David Brooks, Saekyu Lee
  • Publication number: 20180019668
    Abstract: A device and method for hybrid feedback control of a switch-capacitor multi-unit voltage regulator are presented. A multi-unit switched-capacitor (SC) core includes a plurality of SC converter units, each unit with a capacitor and a plurality of switches controllable by a plurality of switching signals. Power switch drivers provide a switching signal to each SC converter unit. A secondary proactive loop circuit includes a feedback control circuit configured to control one or more of the plurality of switches. A comparator is configured to compare the regulator output voltage with a reference voltage and provide a comparator trigger signal. Ripple reduction logic is configured to receive the comparator trigger signal and provide an SC unit allocation signal. A multiplexer is configured to receive a first clock signal, a second clock signal, and the SC unit allocation signal and provide a signal to the power switch drivers.
    Type: Application
    Filed: February 26, 2016
    Publication date: January 18, 2018
    Inventors: Gu-Yeon Wei, Tao Tong, David Brooks, Saekyu Lee