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本帖最后由 forevercgh 于 2009-1-3 22:16 编辑 5 A# o7 Z1 b, r; Q$ u$ K# I+ c
, ?) h0 z' {0 o+ K6 W! o典型的100ohm LVDS差分传输线，Hyperlynx场解析器的概念性错误( ?7 R1 G m5 h( d" ]+ t
- B- w5 j; K- Y' A U7 FField Solver Result：% p/ R/ Q! k: F: \
Differential Z = 100.5 ohms" i' p) l/ _; N
(suggested single line-to-line resistor for differential signals;
! X* K+ M+ i! J9 v9 ]9 Z) G works best for opposed, balanced transitions). t3 K$ W2 j1 T) H; j* T2 L w
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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）
, B% y0 N$ S; {$ { (suggested single line-to-ground resistor for common-mode signals;1 N) q/ n. Z7 P7 n; M
works best for all-1's or all-0's transitions)0 A: G u9 b+ I& W
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Line-to-ground Z = 66.9 ohms
) n( o* [7 L1 W (suggested single line-to-ground resistor for independent signals;9 G! _4 K% `2 d7 B% V0 R N: Y' ]
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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