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論文名稱 Title |
電流式正交輸出交叉耦合弛張振盪器 Current Cross-Coupled Relaxation Oscillator with Quadrature Outputs |
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系所名稱 Department |
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畢業學年期 Year, semester |
語文別 Language |
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學位類別 Degree |
頁數 Number of pages |
47 |
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研究生 Author |
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指導教授 Advisor |
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召集委員 Convenor |
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口試委員 Advisory Committee |
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口試日期 Date of Exam |
2007-07-12 |
繳交日期 Date of Submission |
2007-07-25 |
關鍵字 Keywords |
弛張、正交、振盪器、電流比較器、交叉耦合 quadrature, relaxation, oscillator, cross-coupled, current comparator |
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統計 Statistics |
本論文已被瀏覽 5719 次,被下載 0 次 The thesis/dissertation has been browsed 5719 times, has been downloaded 0 times. |
中文摘要 |
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。 |
Abstract |
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. |
目次 Table of Contents |
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 |
參考文獻 References |
[1] J. Fernandes, M. Kouwenhoven, and C. van den Bos, “The Effect of Mismatch and Disturbance on the Quadrature Relation of a Cross-Coupled Relaxation Oscillator,” ISCAS 2001, Vol. 1, pp. 476-479, May 2001 1 [2] Oliveira, L.B.; Fernandes, J.R.; Kouwenhoven, M.H.L.; van den Bos, C.; Verhoeven, C.J.M., “A quadrature relaxation oscillator-mixer in CMOS” IEEE Conference Proceeding, Vol.1, pp. I689-I692, 2003 [3] C.J.M Verhoeven, "A High-Frequency Electronically Tunable Quadrature Oscillator", IEEE J. Solid-State Circ.,vol. 27, pp. 1097-1 100, July 1992. [4] G. W. Roberts, and A. S. Sedra, ”All current-mode frequency selective circuits,” Electronics Letters, Vol. 25, No. 12, pp. 759-761, 1989. [5] Adel S. Sedra and Kenneth C. Smith, Microelectronic Circuits, Oxford, New York,pp. 1112-1113, 1998. [6] Behzad Razavi, “RF Microelectronics,” Prentice Hall, p. 238, 1998. [7] Behzad Razavi, “RF Microelectronics,” Prentice Hall, p. 290, 1998. [8] H. R. Rategh and T. H. Lee, “Superharmonic Injection-Locked Frequency Dividers,”IEEE Journal of Solid-State Circuits, Vol. 34, No. 6, pp. 813-821, June1996. [9] K. Kurokawa, “Injection Locking of Microwave Solid State Oscillators,” Proceedings of the IEEE, Vol. 61, p. 1386, 1973. [10] J. Cabanillas, L. Dussopt, J. M. L [11] H. Jacobsson, B. Hansson, H. Berg, and S. Gevorgian, “Very Low Phase-Noise Fully-Integrated Coupled VCOs,” IEEE Transactions on Microwave Theory and Techniques, pp. 577-580, 2002. [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 [14] L. Ravezzi, D.Stoppa, and G.F. Dalla B., "Simple High-Speed CMOS Current Comparator," Electronics Letters, Vol. 33,pp. 1829-1830,Oct. 1997 [15] J. N. Babanezhad and G. C. Temes, “A 20-V four-quadrant cmos analog multiplier”, IEEE J. Solid State Circuits, Vol. 20, No.6, pp.1158-1168, Dec. 1985 [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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