Patents by Inventor Xavier Cuignet

Xavier Cuignet 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 for automatic frequency adaptation of a filter in a closed loop
    Patent number: 11513135
    Abstract: A method adapts a resonant frequency of a first filter of a closed control loop to a given frequency. The method includes feeding an output signal of a delta sigma modulator of the closed control loop into a frequency adaptation circuit and determining a first noise spectrum of the output signal in a first frequency band and a second noise spectrum of the output signal in a second frequency band. The first frequency band and the second frequency band are arranged symmetrically with respect to the given frequency. The method includes comparing the first noise spectrum with the second noise spectrum, generating an adaptation signal that causes a frequency adaptation of the resonant frequency if the first noise spectrum differs from the second noise spectrum, and outputting the adaptation signal from the frequency adaptation circuit to a control input of the first filter for adapting the resonant frequency.
    Type: Grant
    Filed: November 13, 2019
    Date of Patent: November 29, 2022
    Assignee: Albert-Ludwigs-Universität Freiburg
    Inventors: Maximilian Marx, Daniel De Dorigo, Yiannos Manoli, Xavier Cuignet
  • Method For Automatic Frequency Adaptation Of A Filter In A Closed Loop
    Publication number: 20200150144
    Abstract: A method adapts a resonant frequency of a first filter of a closed control loop to a given frequency. The method includes feeding an output signal of a delta sigma modulator of the closed control loop into a frequency adaptation circuit and determining a first noise spectrum of the output signal in a first frequency band and a second noise spectrum of the output signal in a second frequency band. The first frequency band and the second frequency band are arranged symmetrically with respect to the given frequency. The method includes comparing the first noise spectrum with the second noise spectrum, generating an adaptation signal that causes a frequency adaptation of the resonant frequency if the first noise spectrum differs from the second noise spectrum, and outputting the adaptation signal from the frequency adaptation circuit to a control input of the first filter for adapting the resonant frequency.
    Type: Application
    Filed: November 13, 2019
    Publication date: May 14, 2020
    Applicant: Albert-Ludwigs-Universitat Freiburg
    Inventors: Maximilian Marx, Daniel De Dorigo, Yiannos Manoli, Xavier Cuignet