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本帖最后由 forevercgh 于 2009-1-3 22:16 编辑
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5 @0 a+ p, } @! W/ o% X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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5 a. r9 L6 Y) u$ R- gField Solver Result:- v1 Y* k& i/ x
Differential Z = 100.5 ohms
& `! _& ?7 t2 Z. p9 @ (suggested single line-to-line resistor for differential signals;
- E' l7 D* [% e% k works best for opposed, balanced transitions)
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+ w: n6 X$ y) w' I% r. x) NCommon-mode Z = 83.5 ohms(错在这里,这里求得的值是Even-mode Z,而非Common-mode Z)
b2 q: _4 ~/ O) {$ U; W (suggested single line-to-ground resistor for common-mode signals;. _* l; k& c, r
works best for all-1's or all-0's transitions)
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# C( l2 ^- h- @8 K+ {% B& SLine-to-ground Z = 66.9 ohms8 G: m2 `/ I7 Y1 Q% Q9 f
(suggested single line-to-ground resistor for independent signals;
( K* ]) d2 I" J# s4 s, w0 P works best for mixed 1's and 0's transitions) |
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