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我自己计算的结果如下,不知道对不对,计算单端阻抗的时候我选H为4MIL,差分计算的时候我选H1=4MIL,H=14MIL,就是走线层绝缘材料的厚度和层压厚度,但是这两个值不知道应该参考哪里来的5 U2 D) M' `" |2 j' ^
USB:- i8 j$ H+ T. X; ?3 @
IMPEDANCE:90 OHM ' \% |- {3 P) D8 ~6 t1 I, x
L1/L8:6/5.5 MIL 89.06 L3/L6:5.5/8 MIL 90.73
5 q% @- H) S" ]& _' N, X. QHDMI:
3 f0 y7 g6 ~" O, j) @1 I+ y4 ]IMPEDANCE:95 OHM / p+ ]; n1 Q( R: m4 E4 S. N4 u
L1/L8:5.1/5.5 MIL 94.32 L3/L6:5.1/9 MIL 95.23
6 z2 O0 R9 x/ e+ C# XLVDS:+ E- ?0 h/ G+ y2 ?1 I
IMPEDANCE:100 OHM ) r$ j5 o6 V3 H
L1/L8:5.1/7 MIL 99.95 L3/L6:5.1/10 MIL 96.31
" s4 x7 d# k- C: p! P: a9 b+ X+ j* c) \, [( G' W% u
DDR:
4 F5 j2 H! Q6 v" xCLK:5 m s2 ~# h" e( t+ ?* N0 ~
IMPEDANCE:65 OHM
. l+ x: y1 V+ n! wL1/L8:10.5/5 MIL 67.57 L3/L6:8.5/5 MIL 68.53
' W5 d2 B5 {. x3 b
2 ?! E0 J( L2 d, k$ SDATA STROBE: B9 Z* u: `1 p4 r
IMPEDANCE:85 OHM $ W8 v$ E, T4 S
L1/L8:6.5/5 MIL 84.41 L3/L6:5.5/5.5 MIL 85.62+ G% t% K- L9 V: u; |! X6 I0 U
- r3 T6 x* |; K$ L- k+ x
DATA CONTROL COMMAND:8 q, ?/ R/ n4 q$ s2 L
IMPEDANCE:37 OHM
. R' K4 O2 R* W' ^, V+ QL1/L8:11.5 MIL 40.68 L3/L6:7.9 MIL 40.151 e m8 o% ~4 E' V1 a
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