Patents by Inventor Kai-Ren Fong

Kai-Ren Fong 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).

  • Charge pump circuit with capacitor swapping technique and associated method
    Patent number: 10879798
    Abstract: A charge pump circuit includes first and second capacitors, first and second controllable current generating circuits, and an interconnection circuit. A first terminal of the first controllable current generating circuit is coupled to a first plate of the first capacitor. A first terminal of the second controllable current generating circuit is coupled to a first plate of the second capacitor. During a first operation mode, the first controllable current generating circuit refers to a first control input for selectively providing a first current, and the second controllable current generating circuit refers to a second control input for selectively providing a second current. During a second operation mode, the interconnection circuit couples the first plate of the second capacitor to a first power rail, and couples both of the second plate of the second capacitor and the first plate of the first capacitor to an output terminal.
    Type: Grant
    Filed: July 18, 2019
    Date of Patent: December 29, 2020
    Assignee: MEDIATEK INC.
    Inventors: Chao-Ching Hung, Yu-Li Hsueh, Kai-Ren Fong
  • CHARGE PUMP CIRCUIT WITH CAPACITOR SWAPPING TECHNIQUE AND ASSOCIATED METHOD
    Publication number: 20200067405
    Abstract: A charge pump circuit includes first and second capacitors, first and second controllable current generating circuits, and an interconnection circuit. A first terminal of the first controllable current generating circuit is coupled to a first plate of the first capacitor. A first terminal of the second controllable current generating circuit is coupled to a first plate of the second capacitor. During a first operation mode, the first controllable current generating circuit refers to a first control input for selectively providing a first current, and the second controllable current generating circuit refers to a second control input for selectively providing a second current. During a second operation mode, the interconnection circuit couples the first plate of the second capacitor to a first power rail, and couples both of the second plate of the second capacitor and the first plate of the first capacitor to an output terminal.
    Type: Application
    Filed: July 18, 2019
    Publication date: February 27, 2020
    Inventors: Chao-Ching Hung, Yu-Li Hsueh, Kai-Ren Fong