Patents by Inventor Pao-Chu Chou

Pao-Chu Chou 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).

  • Switching-mode power supplies and power controllers capable of jittering switching frequency
    Patent number: 10924005
    Abstract: A power controller provides a PWM signal to a power switch in response to a compensation signal to control the power switch, the compensation signal generated in response to an output voltage of a power converter. The power controller is configured to provide a maximum switching frequency limiting a switching frequency of the PWM signal. The power controller jitters the maximum switching frequency, making the maximum switching frequency have a first average switching frequency and a first variation ratio when the compensation signal is a first compensation value, and have a second average switching frequency and a second variation ratio when the compensation signal is a second compensation value. The first average switching frequency is higher than the second average switching frequency, and the second variation ratio is larger than the first variation ratio.
    Type: Grant
    Filed: May 7, 2019
    Date of Patent: February 16, 2021
    Assignee: LEADTREND TECHNOLOGY CORPORATION
    Inventors: Pao-Chu Chou, Ming Chang Tsou
  • Switching-Mode Power Supplies and Power Controllers Capable of Jittering Switching Frequency
    Publication number: 20190348910
    Abstract: A power controller provides a PWM signal to a power switch in response to a compensation signal to control the power switch, the compensation signal generated in response to an output voltage of a power converter. The power controller is configured to provide a maximum switching frequency limiting a switching frequency of the PWM signal. The power controller jitters the maximum switching frequency, making the maximum switching frequency have a first average switching frequency and a first variation ratio when the compensation signal is a first compensation value, and have a second average switching frequency and a second variation ratio when the compensation signal is a second compensation value. The first average switching frequency is higher than the second average switching frequency, and the second variation ratio is larger than the first variation ratio.
    Type: Application
    Filed: May 7, 2019
    Publication date: November 14, 2019
    Inventors: Pao-Chu Chou, Ming Chang Tsou