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研究生:楊哲彰
研究生(外文):Che-chang Yang
論文名稱:電流式正交輸出交叉耦合弛張振盪器
論文名稱(外文):Current Cross-Coupled Relaxation Oscillator with Quadrature Outputs
指導教授:高家雄
指導教授(外文):Chia-Hsiung Kao
學位類別:碩士
校院名稱:國立中山大學
系所名稱:電機工程學系研究所
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2007
畢業學年度:95
語文別:英文
論文頁數:47
中文關鍵詞:弛張正交振盪器電流比較器交叉耦合
外文關鍵詞:quadraturerelaxationoscillatorcross-coupledcurrent comparator
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在現今的電信應用方面,常需要仰賴正交振盪器來展現相位關係的準確度和穩定度。例如使用兩個相互耦合的弛張振盪器來產生出具有相同特性的輸出訊號,而耦合弛張振盪器能夠有非常穩定和準確的90度相位差輸出。本論文介紹一個電流式正交輸出交叉耦合弛張振盪器,其架構是由包含電流比較器的兩個完全相同電流式弛張振盪器所組成的。利用電流的優點來提升其操作頻率,並且藉由交叉耦合的觸發以及回授的特性來實現一高度精確( <1°)與穩定的正交信號輸出。而使用的製程是TSMC 0.35μm 2P4M CMOS 技術。
In modern telecommunications, there is a need for quadrature oscillator exhibiting an accurate and stable phase relation. For example, identical two mutually coupled relaxation oscillator can generate identical quadrature signals, and have extremely accurate and stable phase relation. In this thesis, we propose a current cross-coupled relaxation oscillator with quadrature outputs. The oscillator consists of two identical current relaxation oscillators and a current comparator. The circuit takes the high frequency advantage of current mode circuit. Because of cross-coupled feedback, this oscillator have highly accurate ( <1°) and stable quadrature outputs. It is implemented by using TSMC 0.35μm 2P4M CMOS technology.
ABSTRACT (CHINESE) i
ABSTRACT (ENGLISH) ii
CONTENTS iii
LIST OF FIGURES v
LIST OF TABLE vii

Chapter 1
INTRODUCTION 1
1.1 Background 1
1.2 Thesis outline 4

Chapter 2
BASIC QUADRATURE OSCILLATOR STRUCTURE 5
2.1. Ring Oscillator 5
2.2 RC-CR Phase Shift Circuit 7
2.3 Frequency Divider Design 8
2.4 Cross-Coupled Design 9

Chapter 3
THE PROPOSED QUADRATURE OUTPUT CROSS-COUPLED RELAXATION OSCILLATOR 13
3.1 Current Comparator 16
3.2 Current Schmitt Trigger Structure 18
3.3 OTA Structure 21
3.4 Cross-Coupled Pair Structure 24
Chapter 4
SIMULATION AND MEASUREMENT 25
4.1 Simulation Results 26
4.2 Measurement Results 32
4.3 Comparison 34

Chapter 5
CONCLUSIONS 36

REFERENCE 37
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[12] J. Westra, R. Godijn, CVerhoeven, and A.van Roermund, "Coupled Relaxation Oscillators with Highly Stable and Accurate Quadrature Outputs", Proc. 1st IEEE-CAS Region 8 Worksl7op 012 Analog arid Mi.red IC Design Pnvin Italy, pp.32-35, 1996.
[13] H. Traff, "Novel Approach to High Speed CMOS Current Comparator," Electronics Letters, Vol. 28,pp. 310-312,Jan. 1992
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[16] 彭士豪 , “ A Cross-Coupled Relaxation Oscillator with Accurate Quadrature Outputs”, Department of Electrical Engineering National Sun Yat-Sen University Kaohsiung, Taiwan, master of science, June 2006.
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