Patents by Inventor Chenlong Hou

Chenlong Hou 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).

  • Digital-to-analog converter to reduce noise generated by a quiescent current
    Patent number: 10998912
    Abstract: A digital-to-analog converter includes a first current source module configured to supply a current I1 to the digital-to-analog converter, a first switch control module configured to control connection or disconnection between each branch and a trans-impedance amplifier in the digital-to-analog converter based on a to-be-converted digital signal, where the current I1 supplied by the first current source module flows to the trans-impedance amplifier through a connected branch, and the trans-impedance amplifier is configured to convert the current I1 supplied by the first current source module into an analog voltage and output the analog voltage.
    Type: Grant
    Filed: September 24, 2019
    Date of Patent: May 4, 2021
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Chenlong Hou, Yuemiao Di
  • Radio frequency transmitter
    Patent number: 10917127
    Abstract: A radio frequency transmitter includes a digital-to-analog converter, a passive network, two buffers, a frequency mixer, and a power amplifier. Two output ends of the digital-to-analog converter are respectively coupled to two input nodes of the passive network, and the two output ends of the digital-to-analog converter are respectively coupled to input ends of the two buffers. Output ends of the two buffers are respectively coupled to two input ends of the frequency mixer. An output end of the frequency mixer is coupled to an input end of the power amplifier. An output end of the power amplifier is coupled to an antenna. The passive network is configured to perform filtering processing on an input current signal, and convert the current signal into a voltage signal.
    Type: Grant
    Filed: November 22, 2019
    Date of Patent: February 9, 2021
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Zemin Feng, Chenlong Hou
  • Radio Frequency Transmitter
    Publication number: 20200091946
    Abstract: A radio frequency transmitter includes a digital-to-analog converter, a passive network, two buffers, a frequency mixer, and a power amplifier. Two output ends of the digital-to-analog converter are respectively coupled to two input nodes of the passive network, and the two output ends of the digital-to-analog converter are respectively coupled to input ends of the two buffers. Output ends of the two buffers are respectively coupled to two input ends of the frequency mixer. An output end of the frequency mixer is coupled to an input end of the power amplifier. An output end of the power amplifier is coupled to an antenna. The passive network is configured to perform filtering processing on an input current signal, and convert the current signal into a voltage signal.
    Type: Application
    Filed: November 22, 2019
    Publication date: March 19, 2020
    Inventors: Zemin Feng, Chenlong Hou
  • Digital-to-Analog Converter
    Publication number: 20200021302
    Abstract: A digital-to-analog converter includes a first current source module configured to supply a current I1 to the digital-to-analog converter, a first switch control module configured to control connection or disconnection between each branch and a trans-impedance amplifier in the digital-to-analog converter based on a to-be-converted digital signal, where the current I1 supplied by the first current source module flows to the trans-impedance amplifier through a connected branch, and the trans-impedance amplifier is configured to convert the current I1 supplied by the first current source module into an analog voltage and output the analog voltage.
    Type: Application
    Filed: September 24, 2019
    Publication date: January 16, 2020
    Inventors: Chenlong Hou, Yuemiao Di