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本帖最后由 forevercgh 于 2009-1-3 22:16 编辑 * f) x8 R- J- |. I. X
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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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( g+ U' @7 k. VField Solver Result：
' r/ N- w; V. CDifferential Z = 100.5 ohms- M4 M& f% ?1 I, ^- \% V4 K
(suggested single line-to-line resistor for differential signals;
3 W5 }2 E+ u: u; d works best for opposed, balanced transitions)' o* p4 L$ i- r4 F5 a5 w$ m9 @
q3 H8 I: K, k' D ]) U0 o. DCommon-mode Z = 83.5 ohms（错在这里，这里求得的值是Even-mode Z，而非Common-mode Z）
. N7 s* T' ]" n( T* N3 \ (suggested single line-to-ground resistor for common-mode signals;, g( M2 K; ?$ l2 D3 R
works best for all-1's or all-0's transitions)) M4 W0 k1 D. h( ]1 I( J: c" I% I/ e
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Line-to-ground Z = 66.9 ohms
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works best for mixed 1's and 0's transitions) |
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发表于 2009-1-3 22:13
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