AMD:High-Speed Board Design Techniques 高速电路板设计技术
High-Speed Board Design Techniques高速电路板设计技术
INTRODUCTION
简介
The 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 for 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 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(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 propagation
delays. In the future, much faster devices will become available, with correspondingly faster
edge rates.
今天，速度成为许多系统设计中最为重要的因素。100MHz 到上GHz 的处理器已经非常
普及，将来，会有更高速度的器件出现，以适应人们对于大量数据的处理，如图形处理、音视
频处理等等。
Designing high-speed systems requires not only fast components, but also intelligent and
careful design. The analog aspect of the devices is as important as the digital. In high-speed
systems, noise generation is a prime concern. The high frequencies can radiate and cause
interference. The corresponding fast edge rates can result in ringing, reflections, and crosstalk.
If unchecked, this noise can seriously degrade system performance.
高速系统的设计不仅需要有高速的器件，还需要设计师的智慧与仔细的工作。这对于数字
电路和模拟电路都一样重要。在高速系统中，噪声的产生是一个最值得关注的焦点。高频信号
很容易由于辐射而产生干扰，高速变化的(high skew rate)数字信号会导致振铃(ringing)、反射
(reflection)、串扰(crosstalk)等，如果没有经过认真的检查，这些噪声将严重降低系统的性能。
This application note presents an overview of the design of high-speed systems using a
PC-board layout. It covers:
􀂋 the power distribution system and its effect on boardinghouse generation,
􀂋 transmission lines and their associated design rules,
􀂋 crosstalk and its elimination, and
􀂋 electromagnetic interference.
本文讲述高速系统设计的技术，包括
􀂋 电源分配系统(power distribution system)及其影响;
􀂋 传输线及其相关的设计规则;
􀂋 串扰及其消除;
􀂋 电磁干扰。
........
AMD:High-Speed Board Design Techniques 高速电路板设计技术.pdf 俺不懂,学习中 非常感谢。。 难道是全英文的 非常感谢。。
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