Yes, now I understand.
This is another ocasion when I read so many pages to understand almost
nothing, and you give me the answer in few words :-)
This is a real talent. Maybe you must take into consideration a
teacher career ;-)
Adrian
--- In
Homebrew_PCBs@yahoogroups.com, "Stefan Trethan"
<stefan_trethan@...> wrote:
>
> No, i imagine where the currents go and if the voltage drop they
cause is
> going to upset another circuit.
> If voltage drop is not seen by a sensitive part of the circuit it
does not
> matter.
>
> The reason for star ground is that all the voltage drops are in
parallel
> to each other, so none can be seen by any other part of the circuit.
But a
> star branch to each and every connection is not always possible. So
you
> must think if the voltage drop of one branch will be a problem for
another
> branch, the drops will now be in series. You do not want "noisy"
drops
> from digital circuits to be seen by a analog component that is
sensitive
> to the ground noise.
>
> ST
>