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NS 類比學院教材
+ i C1 M9 @2 t: w+ l1 L" IAgenda) W0 a n7 H8 c* H9 k) A
• Signal Integrity and Line Termination
7 ]4 f" Y, \( l) C• Skin Effect& K' C9 _* p4 N% a5 A; a. Y
• Proximity Effect7 B6 L, S p6 ^
• “Ground” Resistance8 r/ h& Z: U# `& T& _5 N- Z7 R* x
• Radiation
+ b% o; L( T3 d• Noise in the “Ground” System
, j0 O: I8 E/ X1 g3 S• The Split Ground Plane Problem
7 {: x7 r3 a0 r; Q) e% }" O! M8 e• Improved Layout
/ {2 H( i( w! a: {& I" f, d• Summary of Rules# K: X! z* ]. U: x/ S
• Recommended Reading
$ I8 [# E' ?+ J
% t H/ D" @: A7 I4 d7 Y8 {# { Q' S" T( k; R2 N
Signal Integrity Problem4 C* E# K2 Z/ m
• Signals propagate down a line
! E! @0 q1 P- P0 m/ R, s• Improper termination causes reflections+ [7 @9 S5 v; S5 j" q _! O* D
• Reflections
$ u* O7 D% d1 ]8 V– Cause signal distortion6 [# E, U% @$ W6 V2 _* K3 N
– Cause signal radiation
1 a N, F: ] i( s• Distortion# O+ C2 y* N% [: q) p3 F" D
– Leads to a change in timing
, p+ [, z2 `7 g6 u9 \, B+ w– Can lead to timing uncertainty (jitter): ?. i6 T0 |$ [0 h8 p" t8 X
– Jitter causes ADC output noise
6 b# g" S& H" M% D' k: }3 s7 w( O9 O8 @# Z' Y: \! a' r, o
/ f# R6 M' o$ U) b) y7 ?
u- K9 N2 O3 [, q& w. N[ 本帖最後由 sjhor 於 2007-5-8 12:13 AM 編輯 ] |
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