Patents by Inventor Xiaozhen Song

Xiaozhen Song 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).

  • Current sampling circuit and method
    Patent number: 9766274
    Abstract: Disclosed is a current sampling circuit including a proportional current output circuit and a full differential common mode negative feedback circuit, specifically the proportional current output circuit is configured to calculate a current output from a power device according to a preset proportion to obtain a first proportional current and a second proportional current, and to output the first proportional current and the second proportional current to the full differential common mode negative feedback circuit; and the full differential common mode negative feedback circuit is configured to shunt respectively the first proportional current and the second proportional current using a full differential common mode negative feedback network with a bias current in microamps to obtain a first sampling current and a second sampling current, and to output constantly the first sampling current and the second sampling current. Further disclosed is a current sampling method.
    Type: Grant
    Filed: November 10, 2014
    Date of Patent: September 19, 2017
    Assignee: Sanechips Technology Co., Ltd.
    Inventors: Xiaozhen Song, Jie Hu, Yongbo Zhang
  • Current sampling circuit and method
    Publication number: 20160109487
    Abstract: Disclosed is a current sampling circuit including a proportional current output circuit and a full differential common mode negative feedback circuit, specifically the proportional current output circuit is configured to calculate a current output from a power device according to a preset proportion to obtain a first proportional current and a second proportional current, and to output the first proportional current and the second proportional current to the full differential common mode negative feedback circuit; and the full differential common mode negative feedback circuit is configured to shunt respectively the first proportional current and the second proportional current using a full differential common mode negative feedback network with a bias current in microamps to obtain a first sampling current and a second sampling current, and to output constantly the first sampling current and the second sampling current. Further disclosed is a current sampling method.
    Type: Application
    Filed: November 10, 2014
    Publication date: April 21, 2016
    Inventors: Xiaozhen Song, Jie Hu, Yongbo Zhang