Patents by Inventor Xiaotian Su

Xiaotian Su 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).

  • Loudspeaker diaphragm state estimation method and loudspeaker driving circuit using the same
    Patent number: 10356541
    Abstract: A loudspeaker diaphragm state estimation method includes: adjusting a weight value of a diaphragm displacement model by adaptive filtering until an error between an estimated value of a driving voltage of a loudspeaker and a measured value of the driving voltage is less than a predetermined threshold; estimating a diaphragm relative displacement of the loudspeaker according to the diaphragm displacement model corresponding to a final determined weight value; determining a diaphragm relative speed at a next moment based on an input current, a product value of a vector determined by an estimated value of a diaphragm relative speed and an estimated value of a diaphragm relative displacement, and a weight value vector obtained at a present moment; and determining an estimated value of the driving voltage using the estimated value of the diaphragm relative speed, the input current, and a DC impedance of the loudspeaker at the present moment.
    Type: Grant
    Filed: June 7, 2018
    Date of Patent: July 16, 2019
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Hejinsheng Cao, Xiaotian Su
  • LOUDSPEAKER DIAPHRAGM STATE ESTIMATION METHOD AND LOUDSPEAKER DRIVING CIRCUIT USING THE SAME
    Publication number: 20180288544
    Abstract: A loudspeaker diaphragm state estimation method includes: adjusting a weight value of a diaphragm displacement model by adaptive filtering until an error between an estimated value of a driving voltage of a loudspeaker and a measured value of the driving voltage is less than a predetermined threshold; estimating a diaphragm relative displacement of the loudspeaker according to the diaphragm displacement model corresponding to a final determined weight value; determining a diaphragm relative speed at a next moment based on an input current, a product value of a vector determined by an estimated value of a diaphragm relative speed and an estimated value of a diaphragm relative displacement, and a weight value vector obtained at a present moment; and determining an estimated value of the driving voltage using the estimated value of the diaphragm relative speed, the input current, and a DC impedance of the loudspeaker at the present moment.
    Type: Application
    Filed: June 7, 2018
    Publication date: October 4, 2018
    Inventors: Hejinsheng Cao, Xiaotian Su
  • Loudspeaker diaphragm state estimation method and loudspeaker driving circuit using the same
    Patent number: 10051394
    Abstract: A loudspeaker diaphragm state estimation method includes: adjusting a weight value of a diaphragm displacement model by adaptive filtering until an error between an estimated value of a driving voltage of a loudspeaker and a measured value of the driving voltage is less than a predetermined threshold; estimating a diaphragm relative displacement of the loudspeaker according to the diaphragm displacement model corresponding to a final determined weight value; determining a diaphragm relative speed at a next moment based on an input current, a product value of a vector determined by an estimated value of a diaphragm relative speed and an estimated value of a diaphragm relative displacement, and a weight value vector obtained at a present moment; and determining an estimated value of the driving voltage using the estimated value of the diaphragm relative speed, the input current, and a DC impedance of the loudspeaker at the present moment.
    Type: Grant
    Filed: November 1, 2017
    Date of Patent: August 14, 2018
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Hejinsheng Cao, Xiaotian Su
  • LOUDSPEAKER DIAPHRAGM STATE ESTIMATION METHOD AND LOUDSPEAKER DRIVING CIRCUIT USING THE SAME
    Publication number: 20180139552
    Abstract: A loudspeaker diaphragm state estimation method includes: adjusting a weight value of a diaphragm displacement model by adaptive filtering until an error between an estimated value of a driving voltage of a loudspeaker and a measured value of the driving voltage is less than a predetermined threshold; estimating a diaphragm relative displacement of the loudspeaker according to the diaphragm displacement model corresponding to a final determined weight value; determining a diaphragm relative speed at a next moment based on an input current, a product value of a vector determined by an estimated value of a diaphragm relative speed and an estimated value of a diaphragm relative displacement, and a weight value vector obtained at a present moment; and determining an estimated value of the driving voltage using the estimated value of the diaphragm relative speed, the input current, and a DC impedance of the loudspeaker at the present moment.
    Type: Application
    Filed: November 1, 2017
    Publication date: May 17, 2018
    Inventors: Hejinsheng Cao, Xiaotian Su