利用電磁能隙結構達成寬頻接地雜訊抑制之系統化設計

A Systematic Design to Suppress Wideband Ground Bounce Noise In High-Speed Circuits by EBG-Enhanced Structures

王健霖(Chien-Lin Wang)

指導教授 ： 吳瑞北

國立臺灣大學/電機資訊學院/電信工程學研究所/碩士(2006年)

https://doi.org/10.6342/NTU.2006.00341

摘要

對於內嵌式電磁能隙結構(Embedded Electromagnetic Band-Gap)的設計，本論文實現一寬頻接地雜訊的抑制方法於槽線結構以及去耦合電容的電路佈局上。其主要是利用串接多種不同設計頻帶的EBG結構來達成抑制特定槽線耦合雜訊以及去耦合電容無法抑制高頻雜訊的效果；並且，也提出縮小化的螺旋型EBG的結構來達成接地雜訊抑制的效果。
在本文中，為了能夠有效率與系統地設計EBG結構，修正的連通柱電感公式、螺旋縮小化結構的設計圖表、截止帶頻帶邊緣的設計公式以及有效結構的佈局面積，皆在本文中有詳細的討論。並且，利用此一系統化的設計與分析流程，可大幅節省全波模擬軟體所需的運算時間，以更有效且方便的設計方法，來針對所欲抑制的雜訊頻率設計符合規格的EBG結構，
使其能夠更為方便的應用於高速數位電路電磁系統的設計上。
同時，對於另一種常用於寬頻接地雜訊抑制的低週期共平面式電磁能隙結構(Low Periodic Coplanar Photonic Band-Gap)，本文也針對四種已被提出的PBG架構，討論其應用在高速數位電路之電氣系統的設計時容易造成之電阻壓降(IR-drop)與迴流平面不連續的兩大主要問題。並且，分析不同結構的佈局方式對於高速電磁系統的訊號完整性與電源完整性所會造成的影響與考量，以進一步了解不同PBG結構對於整個電氣系統佈局的穩定
性，以及探討相關設計上的優缺點。

關鍵字

電磁能隙結構 ； 低週期共平面式電磁能隙結構 ； 電阻壓降 ； 訊號完整度 ； 電源完整度 ； 接地雜訊

並列摘要

Embedded Electromagnetic Band-Gap-enhanced structures for the ultra-wide band noise suppression on split power/ground planes, signal line crossing slot, and decoupling capacitor combination are proposed, designed, examined, and validated. Using the concept of cascading EBG structures with the different stop-band frequencies and band-edge estimation, the coupling noise between isolation islands can be significantly reduced. A compact size can also be achieved by spiral EBG structures with increasing number of turns to save the occupied area. For the ease and accuracy in the design of EBG structures, the modified inductance formula, the design diagram of spiral EBG structures, and the effective occupied area of EBG structures are also presented. A systematic design procedure is established and based on which, the design of EBG structures for suppressing undesired frequencies becomes more
convenient, without resorting to the time-consuming full-wave simulator.
In addition to the analysis for Embedded EBG structure, the application of Low Periodic Coplanar Photonic Band-Gap structure is discussed in this thesis. LPC-PBG structure is well-known for a good and wide-band ground-bounce reduction, but two main issue of signal integrity including the IR-drop and return path destruction are needed to be reconsidered in a high-speed digital circuit. Thus, some proposed PBG structures are discussed and analyzed with the design of power distribution network, for which the
power integrity and signal integrity problem are taken into account.

並列關鍵字

Embedded Electromagnetic Band-Gap ； Low Periodic Coplanar Photonic Band-Gap ； IR-drop ； Signal integrity ； Power integrity ； Ground bounce noise

參考文獻

[23] 孫瑞伯，多層連通柱結構的等效模型擷取與時域分析，國立台灣大學碩士論文, 2004年6月.

[1] J. Choi, S. Chun, N. Na, M. Swaminathan, and L. Smith, “A methodology for the placement and optimization of decoupling capacitors for Gigahertz systems,” 13th Int. Conf. VLSI Design, pp. 156-161, 2000.

[3] S. Van den Berghe, F. Olyslager, D. De Zutter, J. De Moerloose, and W. Temmerman, “Study of ground bounce caused by power plane resonances,” IEEE Trans. Electromagn. Compat., vol. 40, pp. 111-119, May 1998.

[4] C. T. Wu, G. H. Shiue, S. M. Lin, and R. B. Wu, “Composite effects on reflections and ground bounce for signal line through a split power plane,” IEEE Trans. Adv. Packag., vol. 25, pp. 297-301, 2002.

[6] J. M. Hobbs, H. Windlass, V. Sindaram, S. Chun, G. E. White, M. Swaminathan, and R. Tummala, “Simultaneous switching noise suppression for high speed systems using embedded decoupling,” Proc. 51st Electronic Comp. Technol. Conf., 2001, pp. 339-343.