Patents by Inventor Shuangke LIU

Shuangke LIU 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).

  • Wireless charger and control method
    Patent number: 11569688
    Abstract: This application provides a wireless charger and a control method. The wireless charger includes a class-E power amplifier and a tunable impedance circuit that is connected to an output end of the class-E power amplifier. The class-E power amplifier includes a switching transistor and a tunable capacitance circuit that is parallelly connected to the switching transistor. The wireless charger further includes a control unit, configured to obtain a constraint condition of the class-E power amplifier; determine N1 target equivalent load impedances of the class-E power amplifier based on the constraint condition; and adjust a capacitance value of the tunable capacitance circuit in the class-E power amplifier, and adjust an impedance value of the tunable impedance circuit, to enable an equivalent load impedance of the class-E power amplifier to match one of the N1 target equivalent load impedances.
    Type: Grant
    Filed: November 25, 2020
    Date of Patent: January 31, 2023
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Qitang Liu, Xiaosheng Zeng, Shuangke Liu, Chengbin Ma
  • WIRELESS CHARGER AND CONTROL METHOD
    Publication number: 20210083510
    Abstract: This application provides a wireless charger and a control method. The wireless charger includes a class-E power amplifier and a tunable impedance circuit that is connected to an output end of the class-E power amplifier. The class-E power amplifier includes a switching transistor and a tunable capacitance circuit that is parallelly connected to the switching transistor. The wireless charger further includes a control unit, configured to obtain a constraint condition of the class-E power amplifier; determine N1 target equivalent load impedances of the class-E power amplifier based on the constraint condition; and adjust a capacitance value of the tunable capacitance circuit in the class-E power amplifier, and adjust an impedance value of the tunable impedance circuit, to enable an equivalent load impedance of the class-E power amplifier to match one of the N1 target equivalent load impedances.
    Type: Application
    Filed: November 25, 2020
    Publication date: March 18, 2021
    Inventors: Qitang LIU, Xiaosheng ZENG, Shuangke LIU, Chengbin MA