Power amplification apparatus and method therefor

Details Power amplification apparatus and method therefor Power amplification apparatus and method therefor

1998-08-03

2000-02-22

Mottola, Steven J.

Amplifiers

With semiconductor amplifying device

Including plural amplifier channels

330286, H03F 368, H03F 360

Patent

active

060284854

ABSTRACT:
A method and apparatus for efficiently amplifying input signals includes multiple amplifiers (20, 30). Each amplifier receives a signal from a power divider (12) where the input signal is split with substantially equal phase. Each amplifier drives a load (40) through a parallel coupled line pair (26, 36). The parallel coupled line pairs are preferably implemented in micro-strip or strip line technology. Each amplifier includes gate bias inputs (24, 34) and drain bias inputs (22, 32). The gate bias inputs can be biased equally and the drain bias inputs can be biased equally, resulting in a parallel, power combined, amplifier configuration. Alternately, the drain bias inputs can be staggered, or the gate bias inputs can be staggered to increase efficiency.

REFERENCES:
patent: 5017888 (1991-05-01), Meinzer
patent: 5028880 (1991-07-01), Sakai
patent: 5420541 (1995-05-01), Upton et al.
patent: 5541554 (1996-07-01), Stengel et al.
patent: 5568086 (1996-10-01), Schuss et al.
patent: 5757229 (1998-05-01), Mitzlaff

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