Patents by Inventor Chieh-Ju Chen

Chieh-Ju Chen 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).

  • Ramp generation in buck converters
    Patent number: 11973425
    Abstract: A power converter includes a power stage circuit, a ramp generator circuit, and a control circuit. The power stage circuit generates an output signal according to an input signal and a control signal. The ramp generator circuit generates a ramp signal according to the control signal, the input signal, and the output signal. The control circuit generates the control signal according to the output signal, a reference signal, and the ramp signal.
    Type: Grant
    Filed: December 29, 2021
    Date of Patent: April 30, 2024
    Assignee: NOVATEK Microelectronics Corp.
    Inventors: Chieh-Ju Tsai, Ching-Jan Chen, Zhen-Guo Ding, Zhe-Hui Lin, Wei-Ling Chen
  • Reading stand with page turning mechanism
    Patent number: 4936034
    Abstract: A reading stand includes a page turning mechanism which has two turning arms extending radially from a rotary shaft located adjacent to an intermediate part of a back plate member. The arms are turned from one side of the shaft to the other side so as to turn a paper sheet of a book held by the reading stand. One of the arms has a paper sheet taking member such as a suction cup and the other arm has a paper sheet pressing member. A motor with a control mechanism operates the arms.
    Type: Grant
    Filed: April 14, 1989
    Date of Patent: June 26, 1990
    Inventors: Chieh-Ju Chen, Chien-Chan Chen
  • Vending machine or similar article
    Patent number: D329878
    Type: Grant
    Filed: November 28, 1990
    Date of Patent: September 29, 1992
    Inventor: Chieh-Ju Chen