Advantages of Parallel Hz

[Daniel Mandic]

Even PCB layout software has such problems - you'd think that
something like that would be just a matter of making some code
smart enough to find a path from point A to point B. But does that
code know when sharp corners in that path should be avoided, and
when they're OK? Does it understand noise and crosstalk well
enough to make the appropriate choices in the layout to minimize
those - and is it smart enough to know when it doesn't need to?
Just a few examples out of many...

Bob M.

Hi Bob!


I cannot understand how corners are more bad than round paths. It must
have something to do with electro-magnetical influence (distorted
waves), as the current runs AFAIK in atomic-size which does not make a
difference if there is a corner or not, in that big dimension as that
(the jumping valence-electron in the atomic structure of copper for
example. That's a big place, in that dimension, IMO.).




Best regards,

Daniel Mandic

 

[Daniel Mandic]

I know there are still designers who only use Spice or somesuch to
second guess their work.

Don

Hi Don!


I have not really a clue what the parts are doing (some...).
But I am amazed how easy and cheap I can use strong software
(freeware), to do some schematic (mainly for copying existing ones, to
have a nice PADS-file partslist then).
Starting then the PCB Programm, importing the partlist, routing,
wonderful!

Rats Nest!
Great!



Best regards,

Daniel Mandic

 

[Bob Myers]

I cannot understand how corners are more bad than round paths. It must
have something to do with electro-magnetical influence (distorted
waves), as the current runs AFAIK in atomic-size which does not make a
difference if there is a corner or not, in that big dimension as that
(the jumping valence-electron in the atomic structure of copper for
example. That's a big place, in that dimension, IMO.).

Without getting into the gory details, which would
require a level of math that can't really be expressed
easily in a newsgroup post, it's not a matter of how big the
corners are with respect to atoms or electrons. The problems
come in, basically, from what happens when you have
an abrupt change in the shape of a conductor in terms of
the electric and magnetic fields around it, the concentration
of current within it, and from these the impedance profile
of the conductor as a whole.

But this is exactly what I meant - if you don't know that
such potential problems exist, and instead simply trust
your tools to "do the right thing," you will inevitably run
into them and be unable to correct the design.

Bob M.

 

[Daniel Mandic]

Without getting into the gory details, which would
require a level of math that can't really be expressed
easily in a newsgroup post, it's not a matter of how big the
corners are with respect to atoms or electrons. The problems
come in, basically, from what happens when you have
an abrupt change in the shape of a conductor in terms of
the electric and magnetic fields around it, the concentration
of current within it, and from these the impedance profile
of the conductor as a whole.

I understand. Thanks.

But this is exactly what I meant - if you don't know that
such potential problems exist, and instead simply trust
your tools to "do the right thing," you will inevitably run
into them and be unable to correct the design.

Bob M.

I understand.



Well, then Good Luck ;-)



Best Regards,

Daniel Mandic