Patents by Inventor Xiaofan Franky Fei

Xiaofan Franky Fei 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).

  • Open-loop class-D amplifier system with analog supply ramping
    Patent number: 10658988
    Abstract: A signal processing system may include a modulation stage configured to generate a modulated input signal, an open-loop switched mode driver coupled to the modulation stage and configured to generate an output signal from the modulated input signal, a voltage regulator configured to generate a supply voltage that supplies electrical energy to the open-loop switched mode driver, and a control subsystem configured to, when a magnitude of the modulated input signal falls below a threshold magnitude, control the voltage regulator to control the supply voltage such that the output signal varies non-linearly with the modulated input signal for magnitudes of the modulated input signal below the threshold magnitude.
    Type: Grant
    Filed: April 2, 2018
    Date of Patent: May 19, 2020
    Assignee: Cirrus Logic, Inc.
    Inventors: Miao Song, Xiaofan Franky Fei, Xin Zhao, Tejasvi Das, Lei Zhu, Jing Bai, Alan Mark Morton