High-Speed Board Design Techniques！（中英文）

Allen

INTRODUCTION
* [' x, \! u8 q$ b4 _7 YThe most important factor in the design of many systems today is speed. 66-MHz thru 200-MHz
processors are common; 233 and 266-MHz processors are becoming readily available. The demand
7 Z3 J% L! R& {8 q9 i+ nfor high speed results from: a) the requirement that systems peRForm complex tasks in a time frame
considered comfortable by humans; and b) the ability of component manufacturers to produce
& c6 _; ]  p" {high-speed devices. An example of a) is the large amount of information that must be processed
to perform even the most rudimentary computer animation. Currently, Programmable Array Logic
2 P) k( n! }6 g3 S(PAL®) devices are available with propagation delays of 4.5 ns, and complex PLDs such as MACH
®have propagation delays of 5 ns. While this might seem fast, it is not the propagation delay that
creates the potential for problems, but rather the fast edge rates needed to obtain the fast
; @! i& d' Q9 }' r. f3 [propagation delays. In the future, much faster devices will become available, with correspondingly
faster edge rates.
3 @' M: z* R. b. cDesigning high-speed systems requires not only fast components, but also intelligent and careful
1 ]% Z! S9 Z8 }5 Q1 M) R6 h- C7 _0 [! m( }design. The analog aspect of the devices is as important as the digital. In high-speed systems, noise
" c9 i9 r  p) E  _generation is a prime concern. The high frequencies can radiate and cause interference. The
8 e( L& c: \' T0 s0 x% t# Scorresponding fast edge rates can result in ringing, reflections, and crosstalk. If unchecked, this
: Y' ^' ?7 i% u2 x0 g- a9 rnoise can seriously degrade system performance.

[ 本帖最后由 allen 于 2007-9-18 09:38 编辑 ]

Allen

原帖由 ray 于 2007-9-17 16:36 发表
4 U* ^; u6 x- r, }! X$ X相应的中文翻译版

顶一下！中英文都全了！

sadousadou

先收藏

mengzhuhao

学习学习一下把

gz12326

谢谢共享，学先！

killerljj

太棒了！！！

TOMGRACE

好 书,绝顶!!!!!!!!!!!!!!!!!!!!!!!

alfred0988

好東西耶，感謝啊！

wyj2007

谢谢！！！！

mengjian

这方便啦.

lqusaiy

学习一下,谢谢了

adamjoe

谢谢啊