SI-EH

第１９卷　Ｖｏ１．１９　第１７期　Ｎｏ．１７　电子设计工程　Ｅｌｅｃｔｒｏｎｉｃ　Ｄｅｓｉｇｎ　Ｅｎｇｉｎｅｅｒｉｎｇ　２０１　１年９月　Ｓｅｏ．２０１１　

高速高密度ＰＣＢ的ＳＩ问题　

周胜海．涂友超　

（信阳师范学院物理与电子工程学院，河南信阳４６４０００）　

摘要：随着数字电子产品向高速高密度发展，ＳＩ问题逐渐成为决定产品性能的因素之一，高速高密度ＰＣＢ设计必须　

有效应对ＳＩ问题。在ＰＣＢ级。影响ＳＩ的３个主要方面是互联阻抗不连续引起的反射、邻近互联引起的串扰和逻辑器　件开关引起的ＳＳＮ。从高速高密度ＰＣＢ设计的角度，在介绍ＳＩ问题的产生的基础上，着重分析了反射、串扰和ＳＳＮ的　机理、特性及对ＳＩ的影响。分析结论对高速高密度ＰＣＢ设计实践具有参考作用。　

关键词：ＳＩ；反射；串扰；ＳＳＮ　

中图分类号：ＴＮ４１；ＴＰ３３　文献标识码：Ａ　文章编号：１６７４—６２３６（２０１１）１７—００３７一ｏ４　

ＳＩ　ｐｒｏｂｌｅｍｓ　ｉｎ　ｈｉｇｈ—ｓｐｅｅｄ　ａｎｄ　ｈｉｇｌｌ—ｄｅｎｓｉｔｙ　ＰＣＢｓ　

ＺＨＯＵ　Ｓｈｅｎｇ—ｈａｉ．ＴＵ　Ｙｏｕ—ｃｈａｏ　（Ｃｏｌｌｅｇｅ　ｏｆＰｈｙｓ．＆Ｅｌｅｃ．Ｅｎｇ．，Ｘｉｎｙａｎｇ　Ｎｏｒｍａｌ　Ｕｎｉｖｅｒｓｉｔｙ，Ｘｉｎｙａｎｇ　４６４０００，Ｃｈｉｎａ）　

Ａｂｓｔｒａｃｔ：Ｈｉｇｈ－ｓｐｅｅｄ　ａｎｄ　ｈｉｇｈ－ｄｅｎｓｉｔｙ　ｉｓ　ａ　ｓｔｒｉｋｉｎｇ　ｔｒｅｎｄ　ｏｆ　ｄｉｇｉｔａｌ　ｅｌｅｃｔｒｏｎｉｃ　ｐｒｏｄｕｃｔｓ，ＳＩ（ｓｉｇｎａｌ　ｉｎｔｅｇｒｉｔｙ）ｈａｓ　ｋｅｙ　ｉｍｐａｃｔｓ　

ｏｎ　ｐｅｒｆｏｒｍａｎｃｅ　ｏｆ　ｔｈｅ　ｐｒｏｄｕｃｔｓ，ａｎｄ　ｉｔ　Ｓ　ｃｒｉｔｉｃａｌｌｙ　ｉｍｐｏｒｔａｎｔ　ｔｏ　ｆｉｘ　ＳＩ　ｐｒｏｂｌｅｍｓ　ｉｎ　ｈｉｇｈ￣ｐｅｅｄ　ａｎｄ　ｈｉｇｈ－ｄｅｎｓｉｔｙ　ＰＣＢ　ｄｅｓｉｇｎｓ．Ａｔ　

ｔｈｅ　ｌｅｖｅｌ　ｏｆ　ＰＣＢ，ｔｈｅ　ｔｈｒｅｅ　ｍａｉｎ　ｉｓｓｕｅｓ　ｏｆ　ｃｏｎｃｅｒｎ　ｆｏｒ　ＳＩ　ａｒｅ　ｒｅｆｌｅｃｔｉｏｎｓ　ｏｃｃｕｒｒｉｎｇ　ｂｅｃａｕｓｅ　ｏｆ　ｉｎｔｅｒｃｏｎｎｅｃｔ　ｄｉｓｃｏｎｔｉｎｕｉｔｉｅｓ，　

趣味学英语(一)：Panama（巴拿马）走起

罗马尼亚歌手Matteo作词并演唱

歌曲panama中英对照歌词：

Daca nici asa nu-ti place

若是你不喜欢这地方

Ia mai zboara-n Panama

那就飞往巴拿马吧

Zile zile zile zile eu alerg girl

日复一日 亲爱的我用尽全力拼搏着

Mile mile mile mile pe maidan

不辞辛劳 勇往直前

Pentru tine tine sa-ti dau un dar dar 我要赠予你一份礼物

Cel mai de pret dar fara nici un ban ban

与我而言珍贵无比 无法衡量

Ganja iarba sunt inutile-tile

与他人而言 却是一文不值

Numai tu stii sa-mi dai aripile-pile

只有你知晓如何让我展翅高飞

In Jamaica sau in Chile Chile

在牙买加 在智利 智利

Inima face Boom-Boom numai pentru tine

这颗心只为你怦然心动

Eh eh eh eh eh eh eh eh eh eh

Numai pentru tine

只是为你

Eh eh eh eh eh eh eh eh eh eh

N-ai raspuns la telefon

你不愿接我电话

No problem te scot pe balcon

但也无所谓 我在阳台上找到你 Si-o sa vezi cu ochii tai

你会亲眼看到

Cum ti-aduc flori un camion

我是如何手捧鲜花 赠予你

Si iti cant asa cu chitara mea

我弹奏着吉他 为你献上一曲

Daca nici asa nu-ti place

若是你不喜欢这地方

panama歌词完整版

本文是关于panama歌词完整版的文章，仅供参考，如果觉得很不错，欢迎点评和分享。

Panama的歌词是什么呢。yuwenmi小编整理了相关的歌词，欢迎欣赏与借鉴。 Panama (Radio Edit)- Matteo

Daca nici asa nu-ti place

Ia mai zboara-n Panama

Zile zile zile zile eu alerg girl

Mile mile mile mile pe maidan

Pentru tine tine sa-ti dau un dar dar

Cel mai de pret dar fara nici un ban ban

Ganja iarba sunt inutile-tile

Numai tu stii sa-mi dai aripile-pile

In Jamaica sau in Chile Chile

Inima face Boom-Boom numai pentru tine

Eh eh eh eh eh eh eh eh eh eh

Numai pentru tine

Eh eh eh eh eh eh eh eh eh eh

N-ai raspuns la telefon

No problem te scot pe balcon

Si-o sa vezi cu ochii tai

Cum ti-aduc flori un camion

Si iti cant asa cu chitara mea

Daca nici asa nu-ti place

Ia mai zboara-n Panama

Ce pana mea

Ah ah ah ah mai zboara-n Panama

Ah ah ah ah zboara ce pana mea

撞车台词完整版 1. It's the sense of touch. 00:02 2. What? 3. Any real city, you walk, you know? 4. You brush past people. People bump into you. 00:03 5. In L. A., nobody touches you. 6. We're always behind this metal and glass. 7. I think we miss that touch so much 8. that we crash into each other just so we can feel something. 9. You guys okay? 10. I think he hit his head. 11. You don't think that's true? 12. Stay in your car. 13. Graham, I think we got rear-ended. 14. I think we spun around twice. 15. And somewhere in there, one of us lost our frame of reference. 16. And I'm gonna go look for it. 17. - Calm down, ma'am. - I am calm! 18. I need to see your registration and insurance. 19. Why? It's not my fault! It's her fault! She do this! 20. My fault? 21. Ma'am, you really need to wait in your vehicle. 22. My fault? 23. Stop in middle of street! Mexicans no know how to drive. 24. She "blake" too fast. 00:04 25. I "blake" too fast? I "blake" too fast. 26. - I'm sorry you no see my "blake" lights. - Ma'am. 27. See, I stop when I see a long line of cars stopped in front of me. 28. Maybe you see over steering wheel, you "blake" too! 29. Ma'am! 30. I call immigration on you. Look what you do my car. 31. Officer, can you please write in your report how shocked I am to be hit by an Asian driver! 32. - Ma'am! - Ma'am, no. See, Detective. . . 33. All right. You've got to calm down. 34. Hey, Detective! Nice entrance. 35. Fuck you. 36. Hey, you okay? 37. I'm freezin'. 38. Shit. I heard it might snow. 39. - Get outta here. - That's what I heard. 40. - You got a smoke? - Nah. I quit. 00:05 55. And I'm flying 747 s into your mud huts and incinerating your friends? 56. - Get the fuck out! - No, you get the fuck out! 57. No, don't touch me! He cheat me! 58. - Andy, now! - Let's go. 59. Okay 60. You can give me the gun or give me ack the money. 00:07 61. And I am really hoping for the money. 62. - What kind of ammunition do you want? - Whatever fits. 63. We got a lot of kinds. 64. We got long colts, short colts, bull heads, 65. flat nose, hollow points, wide cutters, 66. and a dozen more that'll fit any size hole. 97. You couldn't find a whiter, safer or better-lit part of this city right now. 98. But yet this white woman sees two black guys 99. who look like UCLA students strolling down the sidewalk, 100. and her reaction is blind fear? 101. Look at us, dawg. Are we dressed like gangbangers? 102. Huh? No. Do we look threatening? No. 103. Fact. If anybody should be scared around here, it's us! 104. We're the only two black faces surrounded by a sea of over-caffeinated white people 105. patrolled by the trigger-happy L. A. P. D. 106. So you tell me. Why aren't we scared? 107. 'Cause we got guns? 137. That is a William Lewis. 138. Found under the front seat. Hollywood Division. 139. Looks like Detective Conklin shot himself the wrong nigger. 140. - How much longer are you gonna be? - This is the last one. 00:12 141. Thank you. 142. You don't think reporters listen to police calls? 143. I need to talk to you for a second. 144. You just give me a minute, all right? 145. - Find Flanagan, will you? Now. - Yes, sir. 146. Yes, honey? 147. I want the locks changed again in the morning. 178. If my car gets jacked, it's gonna make news. 179. Fuck! 180. Why did these guys have to be black? 181. I mean, why? 182. No matter how we spin this, 183. I'm either gonna lose the black vote or I'm gonna lose the law-and-order vote. 184. You're worrying too much. You have a lot of support in the black community. 185. All right. If we can't duck this thing, we're gonna have to neutralize it. 186. What we need is a picture of me pinning a medal on a black man. 187. Bruce? 188. The firefighter. 00:15 189. The one who saved the camp or something. Northridge. What's his name? 220. No problem. 221. I'm gonna have to reach inside the glove compartment to get the registration. 222. - Is that okay? - Nice and slow, please. 00:18 223. Okay. 224. How are you tonight, Officer? 225. Excellent. 226. Here you go. 227. Stay inside the vehicle, please. 228. Let's do it again right now. 229. Step outta the car, please, sir. 230. Wait a minute, Officer. I haven't been drinking or anything. 231. Then we shouldn't have a problem. 262. Put your legs open. 263. Do you have any guns or knives or anything I might get stuck with? 264. I'm wearing a cocktail dress. What do you think? 265. You'd be surprised some of the places I've found weapons. 266. He's clean. 267. What do you think we should do about this, Mr. Thayer? 268. My partner and I just witnessed your wife performing fellatio on you 269. while you were operating a motor vehicle. 270. That's reckless endangerment, which incidentally is a felony. 271. We could charge your wife with lewd conduct and performing a sexual act in public. 272. You say you're a block from home.