Patents by Inventor Jianqin Zheng

Jianqin Zheng 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).

  • Calibration circuit and method
    Patent number: 9401690
    Abstract: A circuit comprises a phase combiner and four output ports. The phase combiner adds an in-phase positive input and a quadrature positive input to obtain an in-phase positive output, adds an in-phase negative input and a quadrature negative input to obtain an in-phase negative output, adds the in-phase negative input and the quadrature positive input to obtain a quadrature positive output, and adds the in-phase positive input and the quadrature negative input to obtain a quadrature negative output. The four output ports, are respectively configured to output the in-phase positive output, the in-phase negative output, the quadrature positive output, and the quadrature negative output.
    Type: Grant
    Filed: February 27, 2014
    Date of Patent: July 26, 2016
    Assignee: BEKEN CORPORATION
    Inventors: Dawei Guo, Jianqin Zheng
  • Calibration Circuit and Method
    Publication number: 20150042391
    Abstract: A circuit comprises a phase combiner and four output ports. The phase combiner adds an in-phase positive input and a quadrature positive input to obtain an in-phase positive output, adds an in-phase negative input and a quadrature negative input to obtain an in-phase negative output, adds the in-phase negative input and the quadrature positive input to obtain a quadrature positive output, and adds the in-phase positive input and the quadrature negative input to obtain a quadrature negative output. The four output ports, are respectively configured to output the in-phase positive output, the in-phase negative output, the quadrature positive output, and the quadrature negative output.
    Type: Application
    Filed: February 27, 2014
    Publication date: February 12, 2015
    Applicant: Beken Corporation
    Inventors: Dawei Guo, Jianqin Zheng
  • CHARGE PUMP, A PHASE LOCKED LOOP CIRCUIT AND A CHARGE PUMP METHOD
    Publication number: 20140333354
    Abstract: The invention discloses a charge pump, a phase locked loop circuit and a charge pump method. The charge pump comprises an input port, a switch and an output port. The input port receives a phase frequency adjustment parameter. The switch switches a first current on or off, according to the phase frequency adjustment parameter, and keeps a second current on. The first current is larger than the second current. The output port outputs a sum of the first current and the second current to a low pass filter.
    Type: Application
    Filed: June 8, 2013
    Publication date: November 13, 2014
    Inventors: Mingsheng Ao, Dawei Guo, Jianqin Zheng