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Class and CMOS RF PA

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

2 of 41

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
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Class and CMOS RF PA
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