🚀 go-pugleaf

On Jan 10, 12:09 pm, Phil Hobbs
<pcdhSpamMeSensel...@electrooptical.net> wrote:
> On 01/10/2012 01:47 AM, David L. Jones wrote:
>
> > Just thought some might be interested in hearing our recent guest on
> > our Amp Hour radio show, Dr Howard Johnson of "Handbook of Black
> > Magic" fame:
> >http://www.theamphour.com/2012/01/10/the-amp-hour-77-winsome-waveform...
>
> > Lots of history of the book, signal integrity, Gigabit Ethernet
> > development, 90 degree PCB bends, audiophoolery, and a whole bunch of
> > other talk over almost 1 1/12 hours.
>
> > Dave.
>
> HJ has a mixture of good stuff and complete nonsense.
>
> I hope you grilled him a bit about his less sensible stuff, like that
> hilariously erroneous video where he attempts to use electrostatics to
> demonstrate that ground currents want to flow under traces.  Of course,
> the impedance levels are millions of times too high for inductance to be
> a factor in that demo, but never mind.    Have a look athttp://www.sigcon.com/Pubs/news/8_08.htmfor the whole ridiculous thing.
>
> (The current path is determined by corona discharge at the sharp corners
> of the metal squares--if you look at all closely, you'll see that the
> discharges always want to go out the corners of the squares.)
>
> Cheers
>
> Phil Hobbs
>
> --
> Dr Philip C D Hobbs
> Principal Consultant
> ElectroOptical Innovations LLC
> Optics, Electro-optics, Photonics, Analog Electronics
>
> 160 North State Road #203
> Briarcliff Manor NY 10510
> 845-480-2058
>
> hobbs at electrooptical dot nethttp://electrooptical.net

That is pretty silly.
But certainly it's a good idea to keep a nice unbroken ground plane
under the signal(s) that you really care about.

George H.