Multi-mode power amplifier

Details Multi-mode power amplifier Multi-mode power amplifier

2007-01-02

2007-01-02

Choe, Henry (Department: 2817)

Amplifiers

With control of power supply or bias voltage

With control of input electrode or gain control electrode bias

C330S310000

Reexamination Certificate

active

11016397

ABSTRACT:
A power amplifier includes an input network, output stages, coupled in parallel and configured to output power optimally in corresponding power-ranges, the output stages coupled to the input network, an output impedance matching network, coupled to the output stages and not containing a switching element, and a bias-control network, coupled between the output impedance matching network, the input network, and the output stages. In some amplifiers the output impedance matching network does not contain a switching element corresponding to the output stage configured to output power in the highest range. In other amplifiers the bias-control network is configured to isolate output stages by providing a hard shut-off to transistors of the isolated output stages.

REFERENCES:
patent: 5051706 (1991-09-01), Zushi
patent: 6791407 (2004-09-01), Grebennikov et al.

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