Patents by Inventor Paulo F. Ribeiro

Paulo F. Ribeiro 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).

  • Multi-phase DC-DC chopper with different number of phases
    Patent number: 5661646
    Abstract: A multi-phase DC chopper circuit having a different number of phases on each side of the current source. The ciruit utilizes fewer chopper phases and produces more discrete DC voltage steps.
    Type: Grant
    Filed: September 25, 1996
    Date of Patent: August 26, 1997
    Assignee: The Babcock & Wilcox Company
    Inventors: Xianrui Huang, Minfeng Xu, Paulo F. Ribeiro