资料介绍
RF功放设计RF Power Amplifier Design
Markus Mayer & Holger Arthaber
Department of Electrical Measurements and Circuit Design Vienna University of Technology June 11, 2001
Contents
¤ Basic Amplifier Concepts l Class A, B, C, F, hHCA l Linearity Aspects l Amplifier Example ¤ Enhanced Amplifier Concepts l Feedback, Feedforward, ... l Predistortion l LINC, Doherty, EER, ...
2
Efficiency Definitions
POUT PDC
¤ Drain Efficiency:
ηD =
1 ¤ Power Added Efficiency: η PA = POUT PIN = η D 1 PDC G
3
Ideal FET Input and Output Characteristics
IDS Im VGS=0
gm VGS VGS=VP VK VDD Saturation VDS
2VP
VP
0
0
VDSmax
Ohmic
Breakdown
κ=
VDD V K VDD
4
Maximum Output Power Match
I DS Im VGS=0
gm VGS VGS=VP VK VDD Saturation VDS
2VP
VP
0
0
VDSmax
Ohmic
Breakdown
ROPT =
VDS max VK Im
5
Cl
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