软件中的问题你注意到了吗？

forevercgh · 发表于 2009-1-3 22:13

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本帖最后由 forevercgh 于 2009-1-3 22:16 编辑

典型的100ohm LVDS差分传输线，Hyperlynx场解析器的概念性错误

Field Solver Result：
Differential Z = 100.5 ohms
(suggested single line-to-line resistor for differential signals;
works best for opposed, balanced transitions)

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）
(suggested single line-to-ground resistor for common-mode signals;
works best for all-1's or all-0's transitions)

Line-to-ground Z = 66.9 ohms
(suggested single line-to-ground resistor for independent signals;
works best for mixed 1's and 0's transitions)

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