設計與分析源極耦合低雜訊放大器｜國立清華大學博碩士論文庫

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研究生：	林佑霖 Yu-Ling Lin
論文名稱：	設計與分析源極耦合低雜訊放大器 The Design and Analysis of LNA with The Source-degenerated Active Inductor
指導教授：	龔正 Jeng Gong
口試委員:
學位類別：	碩士 Master
系所名稱：	電機資訊學院 - 電子工程研究所 Institute of Electronics Engineering
論文出版年：	2008
畢業學年度：	96
語文別：	英文
論文頁數：	63
中文關鍵詞：	主動電感、低雜訊放大器
外文關鍵詞：	Active inductor, Low noise amplifier
相關次數：	點閱：3 下載：0
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本論文主要描述主動電感在低雜訊放大器前端的應用。藉由使用65奈米標準製程研製主動電感應用於無線通訊系統，我們選擇將主動電感耦合於源極端以抑制雜訊並達到縮小面積的目的。主動電感置放於電路的前端對雜訊的影響最為敏感，因此我們提出一些詳細的分析使雜訊能降到最低又不影響電路的特性。此電路操作在中心頻率5.8GHz的特性如下：小訊號增益為22.3 dB，雜訊指數為3.46 dB，輸入與輸出反射也皆在10dB之下。

This thesis presents the design of low noise amplifier with source-degenerated active inductor. The active inductor is targeted at RF applications and is implemented with a standard 65-nm CMOS process. This active inductor is effective to act as a source-degenerated inductor as well as to reduce the chip area and to suppress the noise.
The active inductor naturally contributes some noise to the RF circuits. Here, we provide detailed circuit analyses to reduce the noise without degrading the performance of the LNA. The results show that the LNA operates at 1.2V and 2.5V dual supply voltages can simultaneously achieve the power gain of 22.3 dB and the noise figure of 3.46 dB which are among the best reported values.

Chinese abstract        I
English abstract        II
Acknowledgement        III
Contents        IV
List of Figures        VI
List of Tables        VIII

Chapter 1 Introduction        1
1.1 Motivation        1
1.2 Thesis organization        2
Chapter 2 Design and Analysis of Active Inductors        3
2.1 Introduction of passive inductors        4
2.2 Design and analysis of active inductors        5
2.2.1 The basic gyrator cell        6
2.2.2 The regulated cascode active inductor        9
2.2.3 The low voltage architecture        16
Chapter 3 The Design of Low noise amplifier         19
3-1 The fundamentals of RF low noise amplifier         19
3-2 Noise analysis        20
3-2-1 Channel thermal noise        20
3-2-2 Flicker noise        21
3-2-3 Shot Noise        22
3-2-4 Distributed gate resistance noise        23
3-2-5 Induced gate current noise        23
3-3 The analysis of the source-degenerated low noise amplifier     24
3-3-1 Resistive Termination        24
3-3-2 1/gm termination        25
3-3-3 Shunt-Series Feedback        26
3-3-4 Inductive Degeneration        26
3-4 The small signal analysis of the LNA with the source degenerated active inductor
33

3-5 The noise analysis of the active inductor based LNA        37
3-5-1 The noise analysis of the gyrator cell active inductor        37
3-5-2 The noise analysis of the source degenerated active inductor LNA
41
Chapter 4 Results Discussion        45
4-1 The process technology        45
4-2 Design considerations of the active inductor based on LNA
46
4-3 Pre- and post- layout simulation results        47
4-4 The layout of the LNA        52
4-5 Measurement results        52
4-6 The sensitivity of the LNA with the source-degenerated active  inductor
56
4-7 Performance summaries        57
Chapter 5 Conclusion        58
Reference        59

                                

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