https://scholars.lib.ntu.edu.tw/handle/123456789/121991
Title: | GHz 系統中差模對傳輸線的訊號完整度分析 Signal Integrity for Differential Signaling in Gigahertz Systems |
Authors: | 吳瑞北 | Keywords: | 差模對傳輸線;彈地雜訊;去內箝;共模雜訊;訊號完整度;Differential signaling;de-embedding;Common noise;Signal integrity | Issue Date: | 31-Jul-2003 | Publisher: | 臺北市:國立臺灣大學電信工程學研究所 | Abstract: | 本研究計畫第一年的重點可分為兩部分,第一部份在於研究差模對傳輸線特 性阻抗及其對於跨越窄開槽所引發之彈地雜訊,第二部分則是差模傳輸線的轉角 效應。在第一部份中,我們將改變差模傳輸線的各幾何設計的參數來探討其對於 特性阻抗的影響;接著將對於訊號層的傳輸線(含差模對)建立等效模型,撰寫考 慮窄開槽之彈地雜訊的二維時域有限差分法分析程式,並從而了解到由差模傳輸 線所引發的彈地雜訊相對於由單根導體所引發的將大大降低。在第二部分中,我 們針對強耦合的差模傳輸線發展一套一般商業套裝電磁模擬軟體無法執行的去 內嵌的技術,並經由四端ABCD 矩陣擷取其集總電路模型,再結合耦合傳輸線 模型來分析探討高速數位信號通過差模轉角的訊號完整度。 In the first year, the project emphasize at two parts: one is to investigate the characteristic impedance of differential signaling and the ground bounce induced by crossing the narrow slotline and the other is to find the effect of the bent differential transmission lines. In part one, we change the several dimensions of differential signaling to find the influence on characteristic impedance. Also, based on two dimensional FDTD method, we tailor a simulation program inclusive of a model for differential transmission lines and the ground bounce effects induced by crossing the narrow slotline. Simulation results show that using the differential signaling can greatly reduce the ground bounce. In part two, we present a de-embedding procedure for strongly coupled differential line, which is not available from the present commercial EM field solvers. Although this procedure is general for multiple coupled transmission lines ports, it is applied to extract the 4 port ABCD matrix of the differential bends. After the 4-port ABCD matrix is obtained, the lumped element equivalent circuit model is extracted by generalizing the 2-port ABCD model extraction method. Combining the coupled transmission line sections with the circuit model for bends, the signal integrity effects of differential bends on pulse propagation in high-speed digital circuits can be investigated and demonstrated. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/20262 | Other Identifiers: | 912213E002109 | Rights: | 國立臺灣大學電信工程學研究所 |
Appears in Collections: | 電信工程學研究所 |
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912213E002109.pdf | 238.35 kB | Adobe PDF | View/Open |
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