Power amplifier output switch using hybrid combiner

Details Power amplifier output switch using hybrid combiner Power amplifier output switch using hybrid combiner

2005-11-04

2009-06-02

Pan, Yuwen (Department: 2618)

Telecommunications

Transmitter

Power control, power supply, or bias voltage supply

C455S118000, C455S552100, C455S553100, C340S584000

Reexamination Certificate

active

07542740

ABSTRACT:
A multimode mobile terminal steers signals corresponding to different modes to different outputs of a quadrature combiner. For example, an EGPRS signal is steered to a first output port of the quadrature combiner and a WCDMA signal is steered to a second output port of the combiner. The combiner has a reasonably large degree of isolation between the output ports. The mobile terminal capitalizes on this isolation by reducing the isolation of a switch that facilitates switching between modes.

REFERENCES:
patent: 2007/0046479 (2007-03-01), Hines
patent: 2007/0105510 (2007-05-01), Sorrells et al.

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