Bidirectional distributed amplifier

Details Bidirectional distributed amplifier Bidirectional distributed amplifier

2005-11-01

2005-11-01

Tran, Pablo N. (Department: 2685)

Telecommunications

Receiver or analog modulated signal frequency converter

Noise or interference elimination

C330S128000, C330S302000

Reexamination Certificate

active

06961553

ABSTRACT:
A bidirectional amplifier circuit includes first and second input ports, first and second output ports, a power amplifier, and first, second, third, and fourth filter circuits. The power amplifier includes at least first and second input terminals and first and second output terminals. The first filter circuit is coupled between the first input port and the power amplifier first input terminal. The second filter circuit is coupled between the second input port and the power amplifier second input terminal. The third filter circuit is coupled between the first output port and the power amplifier first output terminal. The fourth filter circuit is coupled between the second output port and the power amplifier second output terminal. Carrier waves of differing frequencies may be injected into the amplifier circuit first and second input ports, and transmitted from the first and second output ports. The configuration provides broadband operation with flat gain and high efficiency at the frequencies of each of the carrier waves.

REFERENCES:
patent: 5969575 (1999-10-01), Helms
patent: 6489843 (2002-12-01), Nishijima et al.
patent: 2002/0034934 (2002-03-01), Watanabe et al.
patent: 2003/0001787 (2003-01-01), Clifton
patent: 2003/0201827 (2003-10-01), Ohnishi et al.

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