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本帖最后由 forevercgh 于 2009-1-3 22:16 编辑
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* N: w8 q3 Q" e, G) `+ I典型的100ohm LVDS差分传输线,Hyperlynx场解析器的概念性错误
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Field Solver Result:% [8 y& l2 U, y9 n- N
Differential Z = 100.5 ohms
" U5 z" z, u8 T, H% ` (suggested single line-to-line resistor for differential signals;
2 d% K. E7 R& g5 @3 p8 q# e& j works best for opposed, balanced transitions)
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3 H1 |& b' |/ i% t) G" P" lCommon-mode Z = 83.5 ohms(错在这里,这里求得的值是Even-mode Z,而非Common-mode Z)
- S5 k& L& R* D, e4 P (suggested single line-to-ground resistor for common-mode signals;
1 Y; _' N# i3 E4 L7 W/ T2 V works best for all-1's or all-0's transitions)) F+ b7 k a7 F o$ P2 J; e
" Z7 J: x) K0 m' X% x dLine-to-ground Z = 66.9 ohms* i# ?$ K! ~" Y5 k3 \) o
(suggested single line-to-ground resistor for independent signals;+ E T( v7 \( K0 B6 Q' L3 V
works best for mixed 1's and 0's transitions) |
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