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NS 類比學院教材
# o1 X: X8 c( e; o4 T* {Agenda1 K* c4 \7 T. s, I2 J
• Signal Integrity and Line Termination* m4 w# U) o" ]3 n Z( N
• Skin Effect" Y; F' W5 b& s8 ~. C: X
• Proximity Effect/ c0 V) w# P0 |* p. L
• “Ground” Resistance9 z: L( ]" e+ N$ D3 v3 }* k
• Radiation
* T( j2 }. U: J, Y6 d$ B• Noise in the “Ground” System
( x- L- T/ v5 n, P' L# _+ @, A R y• The Split Ground Plane Problem. l7 X; f; N; s, U& G, @; v3 C
• Improved Layout
2 m' d1 K6 q5 T$ e# E# B• Summary of Rules
1 p1 _- o; s& f+ Y" ]• Recommended Reading6 n- q; S, _/ N* p ^
, I! v: W' P" f% P. ~7 G+ _. r
5 W4 @& X* x8 a; L& U! lSignal Integrity Problem
* G% U1 I7 o3 J; [ X! \# b• Signals propagate down a line
* g b. c* M5 M0 }' z$ }; e• Improper termination causes reflections
5 }+ f1 t6 C* p4 ~• Reflections
: o2 j$ X3 B9 V: }# x+ Z3 G– Cause signal distortion3 l! X9 |4 c5 c+ c
– Cause signal radiation- J% k# G7 {% J5 t; J' d7 S
• Distortion) t: ]; h! ^. D# T" O
– Leads to a change in timing1 V& M- a+ b# L3 E$ ~9 E8 _
– Can lead to timing uncertainty (jitter)& H+ Y0 t5 P% r9 f8 a
– Jitter causes ADC output noise
# }+ T G. w: [ ?1 ?" ^% z5 g+ L* q7 y! u+ j1 o
- U* s$ p3 W( C) z8 S/ ]
6 U9 j$ F- \4 h8 D% \; v" y8 w[ 本帖最後由 sjhor 於 2007-5-8 12:13 AM 編輯 ] |
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