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On Sat, Apr 27, 2013 at 03:36:17PM +0200, Simon Huwyler wrote:
- How many impedance controlled lines are there? - On how many different layers do I place them?
Stop there. *If* you do impedance controlled lines then you *need* different constraint for each layer, because: a)
I know, and that's what I wanted to say. This WOULD be a case. But I don't care about this one because it gets too complicated.
So, the most flexible way, would indeed be sort of a matrix. Each net has a set of constrains for each layer.
Actually each class would have a constraint with each other class and this for each layer. And I hope you don't want to do cross layer DRC
No, that's what I said. Again. This would be the ultimate freedom - and the ultimate pain. :-)
With these examples I wanted to point out why I chose for my personal patch this way. It does what is used mostly, and it does it easily.
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