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本帖最后由 forevercgh 于 2009-1-3 22:16 编辑 z; v" B3 ?9 e" e
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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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. J H: V- R- m" B; oField Solver Result：) m$ k8 M0 B/ \. W8 W8 e! G% U
Differential Z = 100.5 ohms8 p3 Y2 F8 F6 x/ k( r: t
(suggested single line-to-line resistor for differential signals;
: t- {, M9 B# ?! E/ t4 _ works best for opposed, balanced transitions)
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6 t5 U8 q i& F4 h, I' y: {& FCommon-mode Z = 83.5 ohms（错在这里，这里求得的值是Even-mode Z，而非Common-mode Z）
0 q A4 g7 |4 j" r0 _1 f* \' u (suggested single line-to-ground resistor for common-mode signals;
5 ]& F+ {& {; p) i( U works best for all-1's or all-0's transitions)4 A: L7 D" K7 ]' J, X3 g
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Line-to-ground Z = 66.9 ohms/ X8 K; \- J( }' I: `" s
(suggested single line-to-ground resistor for independent signals; w, I+ |: G+ B2 _+ S
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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