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
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