Patents by Inventor Roger Branson

Roger Branson 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).

  • Intermodulation product cancellation in communications
    Patent number: 7313370
    Abstract: Intermodulation products in the amplifier circuitry of a communications device are cancelled. A primary carrier is processed in a first main branch of amplifier circuit. The primary carrier is coupled to a secondary branch through a first signal splitters. Intermodulation products are created from a portion of the primary carrier coupled through the secondary branch. The intermodulation products are then coupled back into the main branch to produce an output signal provided to a transmitter.
    Type: Grant
    Filed: March 17, 2003
    Date of Patent: December 25, 2007
    Assignee: Nokia Siemens Networks Oy
    Inventor: Roger Branson
  • Intermodulation product cancellation in communications
    Publication number: 20040125885
    Abstract: Intermodulation products in the amplifier circuitry of a communications device are cancelled. A primary carrier is processed in a first main branch of amplifier circuit. The primary carrier is coupled to a secondary branch through a first signal splitter. Intermodulation products are created from a portion of the primary carrier coupled through the secondary branch. The intermodulation products are then coupled back into the main branch to produce an output signal provided to a transmitter.
    Type: Application
    Filed: December 27, 2002
    Publication date: July 1, 2004
    Inventor: Roger Branson
  • Intermodulation product cancellation in communications
    Publication number: 20040127183
    Abstract: Intermodulation products in the amplifier circuitry of a communications device are cancelled. A primary carrier is processed in a first main branch of amplifier circuit. The primary carrier is coupled to a secondary branch through a first signal splifter. Intermodulation products are created from a portion of the primary carrier coupled through the secondary branch. The intermodulation products are then coupled back into the main branch to produce an output signal provided to a transmitter.
    Type: Application
    Filed: March 17, 2003
    Publication date: July 1, 2004
    Inventor: Roger Branson
  • Mixer using four quadrant multiplier with reactive feedback elements
    Patent number: 6255889
    Abstract: A mixer is formed from a four quadrant multiplier to include a common node, first and second cross connected differential amplifiers, a first transistor having a collector coupled to a common emitter node of the first differential amplifier and a second transistor having a collector coupled to a common emitter node of the second differential amplifier. The mixer further includes a first series feedback reactance element coupled between an emitter of the first transistor and the mixer common node and a second series feedback reactance element coupled between an emitter of the second transistor and the mixer common node. The mixer further includes a first shunt feedback reactance element coupled between a base and the collector of the first transistor, and a second shunt feedback reactance element coupled between a base and the collector of the second transistor.
    Type: Grant
    Filed: November 9, 1999
    Date of Patent: July 3, 2001
    Assignee: Nokia Networks OY
    Inventor: Roger Branson