资料介绍
Class and CMOS RF PACMOS RF Power Amplifiers: Nonlinear, Linear, Linearized
David Su
Atheros Communications Sunnyvale, California
Outline
1.
Introduction Nonlinear Power Amplification Linear Power Amplification Linearization using Envelope Elimination and Restoration Conclusion
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IEEE Local Chapter
Nov 2002
RF Power Amplification
Antenna Transmitter RF PA
Purpose: Delivers “narrow-band” RF power to a
50-ohm antenna
Performance: Output Power
Efficiency Linearity
3 of 41
IEEE Local Chapter
Nov 2002
Traditional PA Classification
Class A B C D E F
Modes
Conduction Angle 100%
Output Power moderate moderate small large large large
Maximum Efficiency 50% 78.5% 100% 100% 100% 100%
Gain Large Moderate Small Small Small Small
Linearity Good Moderate Poor Poor Poor Poor
Current Sour