[SI-LIST] Effective impedance of a uniformly loaded bus

Hello experts,

I have question regarding formula C'=3D Cline + NCload/length and Z' =3D
(L/C')^1/2 ("A Handbook of Black Magic" Paragraph 4.4.3.1).

If I design trace with several loads than according to the formula I can
conclude next statement:
Longest trace cause of reducing in total capacitance C' and increase the
Z'.

So, long trace help to driver drive loads (impedance is larger).
I fill confuse, everyone knows that long trace is not good for SI.
=20
Could you please clear me this issue?

 =20

Best Regards,

Edi Fraiman
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