|
EDA365欢迎您登录!
您需要 登录 才可以下载或查看,没有帐号?注册
x
本帖最后由 forevercgh 于 2009-1-3 22:16 编辑 # S! M0 h2 z; u, q- u0 \) ^- _$ O/ E
5 h1 c- G! p) `$ L2 g
典型的100ohm LVDS差分传输线,Hyperlynx场解析器的概念性错误$ E( L( G' G: }, G% S: ~9 V
8 H5 _) x; J" `( [7 sField Solver Result:3 F/ Q" p' C3 o; ?0 S! \3 _+ {
Differential Z = 100.5 ohms5 m6 D6 N" k" N$ q/ |& [& q/ @
(suggested single line-to-line resistor for differential signals;" F8 k% q! }1 [+ S$ m; l
works best for opposed, balanced transitions)4 m R- X3 M/ l
' ~. n7 L" A/ k: p$ U4 g8 _
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)
7 [7 d; h" }- ]! b4 ]# l (suggested single line-to-ground resistor for common-mode signals;
5 g/ ]$ G! a4 i works best for all-1's or all-0's transitions)
0 D7 C3 t3 \1 F1 G* x9 V4 r1 R1 o- i7 ]3 s. ^
Line-to-ground Z = 66.9 ohms
/ U3 J/ X% f3 F' q# U5 c6 Z (suggested single line-to-ground resistor for independent signals;$ n l( Q9 s0 {% d! f, T! z
works best for mixed 1's and 0's transitions) |
|