Patents by Inventor Lou Nuo

Lou Nuo 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 frequency control apparatus and control method thereof
    Patent number: 11121626
    Abstract: A switch frequency control apparatus comprises a timer configured to receive a ramp and a threshold voltage, and generate a control signal for setting gate drive signals of a power converter, a ramp generator configured to generate the ramp through charging a ramp capacitor using a current source having a current level equal to a bias voltage divided by a resistor, and a threshold generator configured to generate the threshold voltage proportional to the bias voltage.
    Type: Grant
    Filed: September 23, 2019
    Date of Patent: September 14, 2021
    Assignee: M3 Technology Inc.
    Inventors: Xiaoyu Xi, Bo Yang, Lou Nuo
  • Switching Frequency Control Apparatus and Control Method Thereof
    Publication number: 20200021188
    Abstract: A switch frequency control apparatus comprises a timer configured to receive a ramp and a threshold voltage, and generate a control signal for setting gate drive signals of a power converter, a ramp generator configured to generate the ramp through charging a ramp capacitor using a current source having a current level equal to a bias voltage divided by a resistor, and a threshold generator configured to generate the threshold voltage proportional to the bias voltage.
    Type: Application
    Filed: September 23, 2019
    Publication date: January 16, 2020
    Inventors: Xiaoyu Xi, Bo Yang, Lou Nuo
  • Switching Frequency Control Apparatus and Control Method Thereof
    Publication number: 20190356225
    Abstract: A switch frequency control apparatus comprises a timer coupled between a bias voltage and ground, wherein the timer comprises a first input configured to receive a ramp, a second input configured to receive a threshold voltage and an output configured to be connected to an input of a PWM circuit, wherein the output of the timer is used for setting either a constant on-time or a constant off-time of a power converter and a threshold generator coupled between the bias voltage and ground, wherein the threshold generator is configured to receive a plurality of control signals of the power converter and generate the threshold voltage based upon a duty cycle of the power converter.
    Type: Application
    Filed: May 16, 2018
    Publication date: November 21, 2019
    Inventors: Xiaoyu Xi, Bo Yang, Lou Nuo
  • Switching frequency control apparatus and control method thereof
    Patent number: 10476387
    Abstract: A switch frequency control apparatus comprises a timer coupled between a bias voltage and ground, wherein the timer comprises a first input configured to receive a ramp, a second input configured to receive a threshold voltage and an output configured to be connected to an input of a PWM circuit, wherein the output of the timer is used for setting either a constant on-time or a constant off-time of a power converter and a threshold generator coupled between the bias voltage and ground, wherein the threshold generator is configured to receive a plurality of control signals of the power converter and generate the threshold voltage based upon a duty cycle of the power converter.
    Type: Grant
    Filed: May 16, 2018
    Date of Patent: November 12, 2019
    Assignee: M3 Technology Inc.
    Inventors: Xiaoyu Xi, Bo Yang, Lou Nuo