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本帖最后由 forevercgh 于 2009-1-3 22:16 编辑 # s' o: M2 p! C
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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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Field Solver Result：
& B6 I- e6 z! F0 c3 l# g8 {Differential Z = 100.5 ohms* V# F5 |/ k( W$ x# e, q) j6 m# F9 H
(suggested single line-to-line resistor for differential signals;
1 z& r C3 m' j* w9 O0 e! S works best for opposed, balanced transitions)
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& U, z9 o( Y( K5 XCommon-mode Z = 83.5 ohms（错在这里，这里求得的值是Even-mode Z，而非Common-mode Z）2 c2 p" x7 k! J! Q% w
(suggested single line-to-ground resistor for common-mode signals;
% U4 a2 @' W5 \ b0 N. O works best for all-1's or all-0's transitions)7 o% G: a! m5 Z. d
/ I! e' k# C( V: n0 m1 gLine-to-ground Z = 66.9 ohms
% ]: d) K k* t6 f" ~3 ^! c8 p6 M, v+ G (suggested single line-to-ground resistor for independent signals;% {5 m; D; \7 m5 ?2 E. n
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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