Power amplifier output stage with multiple power states and...

Details Power amplifier output stage with multiple power states and... Power amplifier output stage with multiple power states and...

2006-05-30

2006-05-30

Mottola, Steven J. (Department: 2817)

Amplifiers

Combined with automatic amplifier disabling switch means

C330S12400D, C330S302000

Reexamination Certificate

active

07053701

ABSTRACT:
A power amplifier output stage that provides multiple power states and mechanisms for enhancing the efficiency of each of its power states. A power amplifier output stage according to the present techniques includes a first output device for driving a load in a first power state and a second output device for driving the load in a second power state along with a matching network for the first power state and a circuit for adapting the matching network to the second power state.

REFERENCES:
patent: 4755769 (1988-07-01), Katz
patent: 5541554 (1996-07-01), Stengel et al.
patent: 5548246 (1996-08-01), Yamamoto et al.
patent: 6128479 (2000-10-01), Fitzpatrick et al.
patent: 6781455 (2004-08-01), Kim
patent: WO 2004/034569 (2004-04-01), None

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