I'm curious about something I read in an article on trace inductance. We
design boards that are 1.9GHz, and the engineers are so worried about
inductance that every decoupling cap (other components too) has two vias per
pad. It seems to me that its not the two vias that make any improvement, but
the fact that there are now two traces instead of one connecting the pad to
the plane.
But these traces are SO SHORT... is the inductance of a 20 mil trace that
travels a short distance (maybe 10 to 100mils) something to worry about? How
do you know when a trace has enough inductance to be a problem? (is there a
short answer? grin...)

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