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NS 類比學院教材
$ z* X# \. e2 xAgenda! m- v5 m4 \+ k* G% i4 `5 W
• Signal Integrity and Line Termination
" o4 E# C8 N+ q8 f* Z# K2 J, K. s5 D• Skin Effect9 G# q5 Y" a& c% n; J: v$ v
• Proximity Effect
. i4 O3 v$ p; ?+ @+ z0 r• “Ground” Resistance* i* u4 i7 ^# `5 n/ `
• Radiation
: J) {6 k S8 ?( N• Noise in the “Ground” System
" q+ [: ?( M) y' h: _% ?• The Split Ground Plane Problem
|. A1 Y, _* X; }4 D" R( w/ H$ h! R" r% k• Improved Layout2 e7 o, p7 [: y3 U: u( p
• Summary of Rules
( d2 }0 J7 M2 P/ A7 j5 }• Recommended Reading
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+ p0 t+ ~5 s4 |& O& MSignal Integrity Problem9 d$ Z& O+ x8 Z. j) s) {
• Signals propagate down a line
9 r6 K3 Q8 b/ |& {. ?• Improper termination causes reflections
: j, I' G2 [! j# S• Reflections# V9 {: l, o# ^
– Cause signal distortion
# V t! z1 x! o– Cause signal radiation& h5 t# Q2 S; h
• Distortion/ O v: f5 i* y8 f: T2 v& K7 d- l
– Leads to a change in timing
. x" t/ g5 \/ z– Can lead to timing uncertainty (jitter)
$ `( M f2 Y7 |& T1 L3 A– Jitter causes ADC output noise
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[ 本帖最後由 sjhor 於 2007-5-8 12:13 AM 編輯 ] |
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