Patents by Inventor Buu Dam

Buu Dam 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).

  • Multiband transmitter circuit with integrated circulators and filters
    Patent number: 10044375
    Abstract: A multi-band transmitter circuit may include a multi-port network configured to divide an input multi-band signal comprising signal components at each of a plurality of frequency bands into a plurality of output multi-band signals. The multi-band transmitter circuit may also include a plurality of band-specific circulator paths. Each band-specific circulator path includes a circulator configured to receive the respective output multi-band signal and operate at a respective one of the frequency bands to provide a respective band-specific signal. The multi-band transmitter circuit further includes a filter circuit that includes a plurality of band-specific filter elements. Each band-specific filter element is coupled to a corresponding circulator and configured to receive the respective band-specific signal and operate at the same frequency band as the corresponding circulator to provide a filtered band-specific signal for transmission.
    Type: Grant
    Filed: January 30, 2015
    Date of Patent: August 7, 2018
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Bi Pham, Buu Dam, Chunyun Jian, Somsack Sychaleun
  • Multiband Transmitter Circuit with Integrated Circulators and Filters
    Publication number: 20180034486
    Abstract: A multi-band transmitter circuit may include a multi-port network configured to divide an input multi-band signal comprising signal components at each of a plurality of frequency bands into a plurality of output multi-band signals. The multi-band transmitter circuit may also include a plurality of band-specific circulator paths. Each band-specific circulator path includes a circulator configured to receive the respective output multi-band signal and operate at a respective one of the frequency bands to provide a respective band-specific signal. The multi-band transmitter circuit further includes a filter circuit that includes a plurality of band-specific filter elements. Each band-specific filter element is coupled to a corresponding circulator and configured to receive the respective band-specific signal and operate at the same frequency band as the corresponding circulator to provide a filtered band-specific signal for transmission.
    Type: Application
    Filed: January 30, 2015
    Publication date: February 1, 2018
    Inventors: Bi Pham, Buu Dam, Chunyun Jian, Somsack Sychaleun