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C:Documents and SettingsFrangWang桌面\st
【文件名】:06922@52RD_HighSpeedBoardDesign.rar
【格 式】:rar
【大 小】:661K
【简 介】:
【目 录】:
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 |
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