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NS 類比學院教材/ V5 n1 v3 c/ ]: P
Agenda( r: ?7 ^! _& G8 D+ `3 f1 v
• Signal Integrity and Line Termination
( i2 {& Z4 u, V8 \; J0 f. b4 @. @6 K• Skin Effect
* G1 T Q5 b5 V5 R4 B• Proximity Effect% { y$ _- G. R& }3 Z1 s
• “Ground” Resistance
, r2 K& y9 w. y- V• Radiation0 N5 \& {; I. I4 z( t5 c( G" Z0 ~ {( G
• Noise in the “Ground” System8 `$ S5 J* s: W, T- m: V, \
• The Split Ground Plane Problem/ t$ m' z/ o R6 F
• Improved Layout
8 I: J: R4 U0 [0 _% ~) q8 L• Summary of Rules
# `! r. a1 a- h+ v- D* U/ o• Recommended Reading
0 K5 M. j# Q' S' P1 i& O' r+ |! o4 T0 A0 _1 S8 v, Z, h
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Signal Integrity Problem( c% j$ O# A$ j* K2 C
• Signals propagate down a line
7 t# h: }* Q/ c% n$ P% P• Improper termination causes reflections
- [+ n' }% r; M' v s% {4 ], h e( r, _• Reflections
+ s& R. G0 {, O– Cause signal distortion+ t' ~! H7 l+ u; i& W. t6 {
– Cause signal radiation
^4 r8 @* ~6 D/ x• Distortion
6 k- I3 C. h, |– Leads to a change in timing1 ^' k6 c! x: k7 W$ l$ I2 v( y0 G
– Can lead to timing uncertainty (jitter)
: N0 g9 c, m; e M7 `– Jitter causes ADC output noise ]) @% N" X2 u( V5 c
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! A4 i1 d8 G2 L( x; V S5 T+ l[ 本帖最後由 sjhor 於 2007-5-8 12:13 AM 編輯 ] |
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