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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
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IMPEDANCE:90 OHM
. F$ k y% S7 M$ Y8 i2 W9 T7 oL1/L8:6/5.5 MIL 89.06 L3/L6:5.5/8 MIL 90.73
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IMPEDANCE:95 OHM
# [! r0 ~6 t) {9 y8 AL1/L8:5.1/5.5 MIL 94.32 L3/L6:5.1/9 MIL 95.23
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IMPEDANCE:100 OHM
& k: ~* M- A. W, V* S) X& UL1/L8:5.1/7 MIL 99.95 L3/L6:5.1/10 MIL 96.31
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DDR:
c* ?" |9 N, A$ \1 }' HCLK:
1 k1 n( ]2 d& j! `IMPEDANCE:65 OHM 6 ]" n" i; w. s k
L1/L8:10.5/5 MIL 67.57 L3/L6:8.5/5 MIL 68.53
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DATA STROBE:
$ [* u# V9 O) T( f! f5 Q# T2 L3 MIMPEDANCE:85 OHM : B8 e+ d& S( i4 L% e$ a
L1/L8:6.5/5 MIL 84.41 L3/L6:5.5/5.5 MIL 85.62
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DATA CONTROL COMMAND:
- t7 L3 j6 F" a* S4 m7 r0 aIMPEDANCE:37 OHM $ P4 U/ C8 U: I: {" ]
L1/L8:11.5 MIL 40.68 L3/L6:7.9 MIL 40.15
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