Patents by Inventor Zhenguo Cheng

Zhenguo Cheng 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).

  • Method and apparatus for RC/CR phase error calibration of measurement receiver
    Patent number: 11811412
    Abstract: A circuit includes a RC-CR circuit and a second circuit. The RC-CR circuit outputs a first signal at a first output node over a RC path, and a second signal at a second output node over a CR path. The second circuit is coupled to the RC-CR circuit at the first output node over the RC path. The second circuit includes an array of capacitors coupled in parallel and a plurality of switches, and each of the array of capacitors is connected, in series, to a corresponding switch in the plurality of switches. Each of the array of capacitors and its corresponding switch are coupled between the first output node and a ground. The plurality of switches is switched on or off such that the first signal and the second signal have a phase difference that falls within a predetermined phase range.
    Type: Grant
    Filed: September 26, 2022
    Date of Patent: November 7, 2023
    Assignee: FUTUREWEI TECHNOLOGIES, INC.
    Inventors: Zhenguo Cheng, Xuya Qiu
  • Method and Apparatus for RC/CR Phase Error Calibration of Measurement Receiver
    Publication number: 20230019136
    Abstract: A circuit includes a RC-CR circuit and a second circuit. The RC-CR circuit outputs a first signal at a first output node over a RC path, and a second signal at a second output node over a CR path. The second circuit is coupled to the RC-CR circuit at the first output node over the RC path. The second circuit includes an array of capacitors coupled in parallel and a plurality of switches, and each of the array of capacitors is connected, in series, to a corresponding switch in the plurality of switches. Each of the array of capacitors and its corresponding switch are coupled between the first output node and a ground. The plurality of switches is switched on or off such that the first signal and the second signal have a phase difference that falls within a predetermined phase range.
    Type: Application
    Filed: September 26, 2022
    Publication date: January 19, 2023
    Applicant: FUTUREWEI TECHNOLOGIES, INC.
    Inventors: Zhenguo Cheng, Xuya Qiu
  • Method and apparatus for RC/CR phase error calibration of measurement receiver
    Patent number: 11456732
    Abstract: A circuit includes a RC-CR circuit and a second circuit. The RC-CR circuit outputs a first signal at a first output node over a RC path, and a second signal at a second output node over a CR path. The second circuit is coupled to the RC-CR circuit at the first output node over the RC path. The second circuit includes an array of capacitors coupled in parallel and a plurality of switches, and each of the array of capacitors is connected, in series, to a corresponding switch in the plurality of switches. Each of the array of capacitors and its corresponding switch are coupled between the first output node and a ground. The plurality of switches is switched on or off such that the first signal and the second signal have a phase difference that falls within a predetermined phase range.
    Type: Grant
    Filed: March 15, 2021
    Date of Patent: September 27, 2022
    Assignee: FUTUREWEI TECHNOLOGIES, INC.
    Inventors: Zhenguo Cheng, Xuya Qiu
  • Method and Apparatus for RC/CR Phase Error Calibration of Measurement Receiver
    Publication number: 20210203315
    Abstract: A circuit includes a RC-CR circuit and a second circuit. The RC-CR circuit outputs a first signal at a first output node over a RC path, and a second signal at a second output node over a CR path. The second circuit is coupled to the RC-CR circuit at the first output node over the RC path. The second circuit includes an array of capacitors coupled in parallel and a plurality of switches, and each of the array of capacitors is connected, in series, to a corresponding switch in the plurality of switches. Each of the array of capacitors and its corresponding switch are coupled between the first output node and a ground. The plurality of switches is switched on or off such that the first signal and the second signal have a phase difference that falls within a predetermined phase range.
    Type: Application
    Filed: March 15, 2021
    Publication date: July 1, 2021
    Applicant: FUTUREWEI TECHNOLOGIES, INC.
    Inventors: Zhenguo Cheng, Xuya Qiu
  • Method and apparatus for RC/CR phase error calibration of measurement receiver
    Patent number: 10951202
    Abstract: A circuit includes a RC-CR circuit and a second circuit. The RC-CR circuit outputs a first signal at a first output node over a RC path, and a second signal at a second output node over a CR path. The second circuit is coupled to the RC-CR circuit at the first output node over the RC path. The second circuit includes an array of capacitors coupled in parallel and a plurality of switches, and each of the array of capacitors is connected, in series, to a corresponding switch in the plurality of switches. Each of the array of capacitors and its corresponding switch are coupled between the first output node and a ground. The plurality of switches is switched on or off such that the first signal and the second signal have a phase difference that falls within a predetermined phase range.
    Type: Grant
    Filed: July 20, 2018
    Date of Patent: March 16, 2021
    Assignee: Futurewei Technologies, Inc.
    Inventors: Zhenguo Cheng, Xuya Qiu
  • Method and Apparatus for RC/CR Phase Error Calibration of Measurement Receiver
    Publication number: 20200028500
    Abstract: A circuit includes a RC-CR circuit and a second circuit. The RC-CR circuit outputs a first signal at a first output node over a RC path, and a second signal at a second output node over a CR path. The second circuit is coupled to the RC-CR circuit at the first output node over the RC path. The second circuit includes an array of capacitors coupled in parallel and a plurality of switches, and each of the array of capacitors is connected, in series, to a corresponding switch in the plurality of switches. Each of the array of capacitors and its corresponding switch are coupled between the first output node and a ground. The plurality of switches is switched on or off such that the first signal and the second signal have a phase difference that falls within a predetermined phase range.
    Type: Application
    Filed: July 20, 2018
    Publication date: January 23, 2020
    Inventors: Zhenguo Cheng, Xuya Qiu