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本帖最后由 Heaven_1 于 2022-4-28 17:21 编辑 5 o0 m$ A8 N. z' s5 r" Z% N2 `
4 m9 w; ~2 u" w) u高速信号设计Guidelines/ C0 ^7 c+ ?2 f6 ~" }! n5 f
Theoretical Overview
: F: w/ F1 E. d4 k9 @: USome basic understanding is desirable to effectively use the PCB design rules given in this document. It is
7 j* \7 r/ L6 D2 A0 K1 u" S3 `% uthen easy to identify the undesirable effects that can arise and how to avoid them. The reason PCB layout! x$ A: e$ |/ ]. p9 ^+ L6 J
becomes more and more important is because of the trend to faster, higher integrated, smaller form: \( f" I" q: l
factors, and lower power electronic circuits. The higher the switching frequencies are, the more radiation( K2 M- U2 S& i
occurs on a PCB. With good layout, many EMI problems can be minimized to meet the required- L& n, G5 P) H
specifications.
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# |1 Q4 `% {" ?0 C, mElectromagnetic InteRFerence and Electromagnetic Compatibility$ ?6 `+ U0 N' B& a8 x/ _
Electromagnetic interference (EMI) is radio frequency energy that interferes with the operation of an! n% U6 y2 E4 C5 {
electronic device. This radio frequency energy can be produced by the device itself or by other devices$ K! I4 K4 B- \- U
nearby., H! {* y6 r+ X
Electromagnetic compatibility (EMC) is the ability of an electronic product to operate without causing EMI3 Z6 H" b& o" b2 S* o; k0 |( Y# d
that would interfere with other equipment and without being affected by EMI from other equipment or the
v1 U9 Q9 n* Q% s2 ?1 lenvironment.# y& r$ H* G0 N" z. h
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发表于 2022-4-28 13:42
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