Patents by Inventor Dawei Mai

Dawei Mai 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).

  • Apparatus for mitigating wandering spurs in a fractional-N frequency synthesizer
    Patent number: 11552645
    Abstract: The present invention provides a fractional-N frequency synthesizer comprising a divider controller comprising a multistage noise Shaping (MASH) digital delta-sigma modulator comprising L error feedback modulator (EFM) stages, wherein the jth EFM stage is configured to receive as an input the sum of the error of the preceding EFM stage and a high amplitude dither signal derived from the error of the kth EFM stage, where 1?j?k?L.
    Type: Grant
    Filed: June 16, 2021
    Date of Patent: January 10, 2023
    Assignee: University College Dublin
    Inventors: Dawei Mai, Michael Peter Kennedy
  • APPARATUS FOR MITIGATING WANDERING SPURS IN A FRACTIONAL-N FREQUENCY SYNTHESIZER
    Publication number: 20210399734
    Abstract: The present invention provides a fractional-N frequency synthesizer comprising a divider controller comprising a multistage noise Shaping (MASH) digital delta-sigma modulator comprising L stages, wherein the jth stage is configured to receive as an input the sum of the error of the preceding stage and a high amplitude dither signal derived from the error of the kth stage, where 1?j?k?L.
    Type: Application
    Filed: June 16, 2021
    Publication date: December 23, 2021
    Inventors: Dawei Mai, Michael Peter Kennedy