High efficiency RF power amplifier

Details High efficiency RF power amplifier High efficiency RF power amplifier

2005-05-03

2005-05-03

Choe, Henry (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including particular power supply circuitry

C330S285000

Reexamination Certificate

active

06888409

ABSTRACT:
A radio frequency (RF) power amplification system uses multiple DC power sources to achieve efficient operation. In at least one embodiment, linear operation is maintained by appropriately selecting a reference voltage at which a secondary power source is activated.

REFERENCES:
patent: 6148220 (2000-11-01), Sharp et al.
patent: 6646511 (2003-11-01), Canyon et al.
patent: 6825725 (2004-11-01), Doherty et al.
Kennington, Peter B., “High-Linearity RF Amplifier Design”,Artech House, Inc., Norwood, MA, section 3.10,(2000),124.
Krauss, Herbert, et al., “Solid State Radio Engineering”,John Wiley&Sons, Inc., New York, section 14-6,(1980),468.
Maclean, Kenneth, et al., “A 610mW Zero-Overhead Class G Full-Rate ADSL Central-Office Line Driver”,2003 IEEE International Solid-State Circuits Conference, Session 23, Paper 23.4,(2003),10 pages.

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