|
|
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 7 ~) t: Q+ u$ q3 J& I P
( A/ j( r2 C+ U
典型的100ohm LVDS差分传输线,Hyperlynx场解析器的概念性错误
& V) q g: R4 {' C- A1 P: p, b* }4 M: H- `. R3 o. s
Field Solver Result:7 p6 `' ~ S5 o+ A
Differential Z = 100.5 ohms- \9 u2 |: U" P) a0 k$ x& n2 K( P
(suggested single line-to-line resistor for differential signals;
2 T9 a3 z, G! u works best for opposed, balanced transitions), S* E. @/ F" Y
: e4 k/ \6 \) p D8 KCommon-mode Z = 83.5 ohms(错在这里,这里求得的值是Even-mode Z,而非Common-mode Z)
6 p- T) T* ]1 C% s! f (suggested single line-to-ground resistor for common-mode signals;+ q# u7 [" i3 T' M5 ]
works best for all-1's or all-0's transitions)" ~ y( Y& Y/ m% ]% `
. M( D2 h1 J+ f# C2 G
Line-to-ground Z = 66.9 ohms
; N* [9 d a% f# n9 C) P1 g/ l (suggested single line-to-ground resistor for independent signals;
9 M/ n9 \" z3 ~ S r* F works best for mixed 1's and 0's transitions) |
|