On 07/14/2018 02:37 AM, Gene Heskett wrote:
Not exactly 100% correct John. High frequencies are
generally carried only by current flow at the skin of a
conductor. And the large conductor, while having some rise
in impedance, is still the better conductor because the
smaller wire has far less surface skin area, raising both
its impedance and its ohmic effects faster than the big wire.
There's also loops. Bundling the power supply and ground
return close together minimizes inductance. Having the
supply and return form a big loop increases inductance, and
can cause greater noise as well as radiation of EMI. So, in
general, you want the return wires to follow the supply
wires closely.
Jon
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