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本帖最后由 forevercgh 于 2009-1-3 22:16 编辑 & f" e: T# U- \
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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. J0 O7 K8 m& |) p& D1 X4 j% G
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Field Solver Result：" }$ f7 \7 Q/ ?
Differential Z = 100.5 ohms
! T9 v4 `' O! T! I& I1 [' Q (suggested single line-to-line resistor for differential signals;
; |4 K# j; d( l+ o, b' ^! y# L works best for opposed, balanced transitions)
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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）4 [8 r4 @ _' x8 g, [. c5 o
(suggested single line-to-ground resistor for common-mode signals;, \# D2 O' s; a7 R! s+ o# V9 H
works best for all-1's or all-0's transitions)
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Line-to-ground Z = 66.9 ohms
v; t: v. @% f5 E$ V$ u6 g V (suggested single line-to-ground resistor for independent signals;
& ]* i) W( }9 K8 f S( N6 U 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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淘帖
支持！
反对！