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本帖最后由 forevercgh 于 2009-1-3 22:16 编辑 & s% f) Z$ I8 t7 K6 J
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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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7 t5 w* A' v/ q6 z6 \/ G- M/ @+ F+ }Field Solver Result：
" P) \! n$ w3 l2 M' v( F1 D; nDifferential Z = 100.5 ohms7 h" }5 l! R; n4 h' B
(suggested single line-to-line resistor for differential signals;
; w7 a) K8 `' J; M9 {/ D works best for opposed, balanced transitions)- z: G" Q; f5 H4 S. b
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Common-mode Z = 83.5 ohms（错在这里，这里求得的值是Even-mode Z，而非Common-mode Z）
1 J; x c2 Y* r. \7 C! X) M (suggested single line-to-ground resistor for common-mode signals;
) d* F* _' x5 L, c( A5 w a works best for all-1's or all-0's transitions)
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Line-to-ground Z = 66.9 ohms
/ {8 [5 V! w4 G. ?1 q$ T2 c (suggested single line-to-ground resistor for independent signals;
& B9 O& A9 s5 V, P- M2 [$ B 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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