On Fri, 20 Sep 2013 12:32:09 +1000
Manu <turkeyman@gmail.com> wrote:

>
> Aye to that; I had a lot of problems with the gnd circuit on vintage
> hardware. They were very poorly isolated, and the gnd circuit would
> often feed-back through all manner of surprising places.
> A capacitor will smooth it off a bit, maybe protect you against some
> suddenly flipping bits, or at least delay it until after a bit value
> sampling tick has happened.
> Considering how tricky that stuff is in practise, I'd like to know
> more how it extends to modern circuitry. surely modern hardware must
> be better isolated...
>

A good question, I'd be curious too.

I understand that at physical scale of modern hardware they actually
have to take quantum phenomena into account. Which is kind of
mind-blowing. I have no idea how much that might relate to gnd
isolation though.

Maybe this just shows my naivety, but I wonder if modern clock speeds
might actually help dealing with gnd isolation. Ie, not enough time for
the signals to bounce enough to cause trouble? I'm probably just
speaking total BS though.