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NS 類比學院教材
& V. ^2 k4 v( {- YAgenda$ ~" _1 |0 u3 n' W* C8 Q
• Signal Integrity and Line Termination3 T* |; |4 l& {6 P5 l" X, y6 ~
• Skin Effect
; }8 I- n: z% _7 k( u1 |• Proximity Effect' @7 d) ?( A0 n1 Y
• “Ground” Resistance
6 Z& c+ T' l+ d3 t; T% t* Z• Radiation* u% I8 S v! F& x1 G
• Noise in the “Ground” System
% ]% W4 s7 m% b" S, G• The Split Ground Plane Problem
: C* F7 z- W1 C7 G. w• Improved Layout
5 x6 Y$ ^- e) a" n• Summary of Rules! w! n4 c/ c" m: _" v9 a) u
• Recommended Reading( E7 [- }( B% G3 [* [; h1 [6 O; |
" D3 U" J# Q. R, H1 \: ` s, K
0 n8 j' \; \& U+ w' |+ V
Signal Integrity Problem
4 v1 \# t1 g) w" m8 e• Signals propagate down a line7 o w# M5 R* D5 {' {. ~ S" P) p1 G
• Improper termination causes reflections" A" O! x1 l3 f! M9 l
• Reflections
: D6 M7 C- q) m z5 r5 O– Cause signal distortion) W4 V3 V! r4 ]
– Cause signal radiation
V% X4 s2 S- T5 A2 z9 Z8 \' X P• Distortion
, A$ {- m9 C/ Y! e# H _1 I– Leads to a change in timing
; J! r6 \3 |/ H4 N, X2 [5 r: X– Can lead to timing uncertainty (jitter)
- J/ c! b0 y# U* O6 b. k( w i9 S– 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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