kicad-developers team mailing list archive

[Jeff Young <jeff@xxxxxxxxx>]

When calculating obstacles we currently use the diff-pair gap as a clearance between a diff-pair trace and a diff-pair pad.

I’m pretty sure that’s wrong.  I’m just not sure how wrong.

I suspect the diff-pair gap shouldn’t be used as a clearance at all.  It’s the gap between the traces, not a clearance.

But maybe we should consider it a clearance between two tracks of a diff-pair.  This would allow you to manually route each wire.  But if you do that, should we consider it a diff-pair or not?  (Even if we use the gap as a clearance, it’s only going to enforce minimum distance; it won’t keep the tracks gap-width apart.  And I imagine you won’t be able to tune it.  So I’m not sure it’s really a diff-pair.)

Thoughts?

Cheers,
Jeff.

https://bugs.launchpad.net/kicad/+bug/1789690