Power amplifier (PA) efficiency with low current DC to DC...

Details Power amplifier (PA) efficiency with low current DC to DC... Power amplifier (PA) efficiency with low current DC to DC...

2006-08-15

2006-08-15

Nguyen, Patricia (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including particular power supply circuitry

C330S296000, C330S291000

Reexamination Certificate

active

07091790

ABSTRACT:
A novel method and apparatus is disclosed for reducing power dissipation of RF power amplifiers when a reduced output power level is required. The mechanism has the specific purpose of optimizing the collector terminal voltage on portions of the amplifier's RF chain for maintaining linearity while minimizing power consumption. The apparatus permits a smaller DC to DC converter to be used than in prior art, such that it is implemented in the same semiconductor die or module. Furthermore, the invention eliminates the amplification and phase continuity issues that arise from switched state power amplifiers and envelope-following approaches.

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patent: 6646511 (2003-11-01), Canyon et al.
patent: 2002/0113655 (2002-08-01), Laulzenhiser et al.

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