Roger W Branson

US Patent:

7313370, Dec 25, 2007

Filed:

Mar 17, 2003

Appl. No.:

10/388641

Inventors:

Roger Branson - Flower Mound TX, US

Assignee:

Nokia Siemens Networks Oy - Espoo

International Classification:

H04B 1/04

US Classification:

4551142, 455 631, 455 6713, 330149

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.

US Patent:

20040125885, Jul 1, 2004

Filed:

Dec 27, 2002

Appl. No.:

10/329995

Inventors:

Roger Branson - Flower Mound TX, US

International Classification:

H04L027/04
H04L027/12

US Classification:

375/295000

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.

US Patent:

62558897, Jul 3, 2001

Filed:

Nov 9, 1999

Appl. No.:

9/436402

Inventors:

Roger Branson - Flower Mound TX

Assignee:

Nokia Networks OY - Espoo

International Classification:

G06F 744
G06G 716

US Classification:

327359

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. In an alternative embodiment of the mixer, the mixer further includes first and second output nodes, a third shunt feedback reactance element coupled between the base of the first transistor and the first output node of the mixer, and a fourth shunt feedback reactance element coupled between the base of the second transistor and the second output node of the mixer.