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博碩士論文 etd-0802110-135001 詳細資訊
Title page for etd-0802110-135001
論文名稱
Title
軟性電路板傳輸線在顯示驅動電路之模型與分析
Model and Analysis of Transmission Lines on Flexible Printed Circuit for the Video Driver Circuit
系所名稱
Department
畢業學年期
Year, semester
語文別
Language
學位類別
Degree
頁數
Number of pages
75
研究生
Author
指導教授
Advisor
召集委員
Convenor
口試委員
Advisory Committee
口試日期
Date of Exam
2010-06-22
繳交日期
Date of Submission
2010-08-02
關鍵字
Keywords
去嵌入、軟性電路板、眼圖
Eye-diagram, De-embedding, Flexible Printed Circuit Board
統計
Statistics
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中文摘要
隨著電子元件微型化和傳輸速率提高,數位訊號電路將會衍生出電磁干擾(Electromagnetic Interference)及訊號完整性(Signal Integrity)的問題。而軟性電路板是現今電子系統中,被廣泛應用的元件,特別是在顯示器電路中。本文透過傳輸線等效模型去解釋軟板傳輸線結構上的效應。眼圖(Eye-diagram)是用來分析高速訊號傳輸品質較快速且便利的工具,利用等效電路模型的結構可用來取代電磁數值模型(EM model)模擬。最後利用差動電路和終端反射係數提升眼圖的眼高及眼寬,使訊號傳輸品質提升。
在顯示驅動電路中,由於終端電阻會因積體電路是否上電而有所不同,因為連接器(connector)而使得標準探針無法直接量測到所需之複模參數。因此,我們提出一種去嵌入(de-embedded)的方法,將測試板上的高速互連線效應扣除。最後透過簡單的驗證,此方法可應用在行動產業處理器介面聯盟規範:D-PHY, v0.90.00中的複模散射參數。
Abstract
With smaller electronic devices and higher transmission speeds, a digital circuit will cause potential electromagnetic interference (EMI) and signal integrity (SI) problems. Nowadays, the flexible printed circuit board (FPC) is widely used in electronic systems, especially in the video circuit. In this thesis, we used transmission line model to explain effect of the structure of the flexible printed circuit board transmission lines. Eye-diagram is a fast and convenient tool to analyze the quality of the high speed transmission, and we can use the equivalent model to substitute for the electromagnetic (EM) model to simulate the performance. We used differential circuit and the reflection gain to increase the height and width parameters of Eye-diagram, and make the quality of signal transmission higher.

For video driver circuit, since the terminal resistance is different depending on whether the IC is on or off, the standard probe cannot measure mixed-mode S-parameter directly due to the connectors. Thus, we provided a de-embedding method to remove the effects of high speed interconnect line on the test board. Finally, we use a simple structure to verify the method, and it can be used to measure mixed-mode S-parameter on the standard of Mobile Industry Processor Interface (MIPI) for D-PHY, v0.90.00.
目次 Table of Contents
致謝 i
中文摘要 iii
Abstract iv
目錄 v
圖表目錄 vi
第一章 序論 1
1.1 研究動機 1
1.2 研究方法 3
1.3 論文大綱 3
第二章 傳輸線模型 4
2.1 背附金屬式共平面波導結構 4
2.2 模型分析 4
2.2.1 背附金屬式共平面波導分析 4
2.2.2 微帶線模型分析 7
2.2.3 步階阻抗不連續效應 8
2.2.4 彎角效應 9
2.2.5 開路效應 10
第三章 軟性電路板等效模型 12
3.1 平面軟板等效模型 12
3.2 彎曲軟板電路分析 19
3.3 眼圖之眼睛張開程度之改善與驗證 22
第四章 高速介面線量測與校正 32
4.1 單端散射矩陣與複模散射矩陣轉換 35
4.2 互連線耦合效應 37
4.3 模擬與量測 39
4.4 驗證與討論 51
第五章 結論 62
參考文獻 63
參考文獻 References
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[11]MIPI Alliance Specification for D-PHY, v0.90.00, 8 Oct, 2007.
[12]J. Frei, X. D. Cai, and S. Muller, “Multiport S-Parameter and T-parameter conversion with symmetry extension,” IEEE Trans. Microw. Theory Tech., vol. 56, pp.2493–2504, Nov. 2008.
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[15]K. Yamagishi, and S. Saito, “Methods of eye-pattern window improvement using reflections caused by impedance mismatch: Post-Emphasis technique,” IEEE 14th Topical Meeting Elect. Perform. Electron. Packag., pp. 209–212, Oct. 2005.
[16]Advanced Design System User Manual, Agilent Technologies, Palo Alto, CA, USA.
[17]A. Takagi, “EMI reducing technique for Low-Voltage Differential Signal on the flexible printed circuit board”, Electronics and Communications in Japan, vol. 88, NO. 7, 2005.
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