Re: [SI-LIST] : Some Semiconductors are Unnecessarily Fast

Hans Mellberg (emcconsultant@yahoo.com)
Wed, 14 Jul 1999 13:22:35 -0700 (PDT)

Using a more resistive metal will attenuate the signal rather than slow
down the edge rate. In the transmission line, the resistance will only
serv to attenuate, whereas the L/l and C/l determine the transmission
line characteristics and behavior.

Besides, not to many other metals have affinity for solder. You would
be restircted to metals such as tin or zinc which have lower
conductivities than copper.

--- Philip Gantt <pgantt@cisco.com> wrote:
> Has anyone considered that if a more resistive
> material (other than copper) were used for PCB
> laminates, the inherent resistance of the conductors
> would slow the edge rates and also reduce EMI? This
> might eliminate the need for
> external resistors as well. Just a thought...
>

===
Best Regards
Hans Mellberg
EMC Consultant
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