Patents by Inventor Haiwen Jiang

Haiwen Jiang 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).

  • Q-factor detection method
    Patent number: 10804750
    Abstract: A method of measuring a Q-factor in a wireless power transmitter includes charging a capacitor in a LC tank circuit that includes a transmission coil to a voltage; starting a Q-factor determining by coupling the LC tank circuit to ground to form a free-oscillating circuit; monitoring the voltage across the capacitor as a function of time as the LC tank circuit oscillates; and determining the resonant frequency and the Q-factor from monitoring the voltage.
    Type: Grant
    Filed: August 16, 2018
    Date of Patent: October 13, 2020
    Assignee: Integrated Device Technology, Inc.
    Inventors: Rui Liu, Zhitong Guo, Haiwen Jiang
  • Q-factor measurement
    Patent number: 10797535
    Abstract: In accordance with some embodiments of the present invention, a method of determining a Q-factor in a transmit circuit with a resonant circuit includes setting a system voltage; performing a coarse scan to determine a course resonant frequency; performing a fine scan based on the course scan to determine a resonant frequency; performing a final measurement at the resonant frequency to determine an average system voltage and an average peak voltage of the resonant circuit; calculating a Q parameter from the average system voltage and the average peak voltage; and calculating the Q-factor from the Q parameter.
    Type: Grant
    Filed: October 8, 2018
    Date of Patent: October 6, 2020
    Assignee: Integrated Device Technology, Inc.
    Inventors: Nicholaus Smith, Stefan Maireanu, Haiwen Jiang, David Wilson
  • Q-factor detection method
    Publication number: 20190140489
    Abstract: A method of measuring a Q-factor in a wireless power transmitter includes charging a capacitor in a LC tank circuit that includes a transmission coil to a voltage; starting a Q-factor determining by coupling the LC tank circuit to ground to form a free-oscillating circuit; monitoring the voltage across the capacitor as a function of time as the LC tank circuit oscillates; and determining the resonant frequency and the Q-factor from monitoring the voltage.
    Type: Application
    Filed: August 16, 2018
    Publication date: May 9, 2019
    Inventors: Rui LIU, Zhitong GUO, Haiwen JIANG
  • Q-FACTOR MEASUREMENT
    Publication number: 20190109499
    Abstract: In accordance with some embodiments of the present invention, a method of determining a Q-factor in a transmit circuit with a resonant circuit includes setting a system voltage; performing a coarse scan to determine a course resonant frequency; performing a fine scan based on the course scan to determine a resonant frequency; performing a final measurement at the resonant frequency to determine an average system voltage and an average peak voltage of the resonant circuit; calculating a Q parameter from the average system voltage and the average peak voltage; and calculating the Q-factor from the Q parameter.
    Type: Application
    Filed: October 8, 2018
    Publication date: April 11, 2019
    Inventors: Nicholaus Smith, Stefan Maireanu, Haiwen Jiang, David Wilson