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Relative propogation delay target

CarlD

I have found that with length matching, relative propogation delay has proven to be the best tool, but there is one deficinecy that irks me. The target is chosen from unrouted manhatten distance, and stays at that distance through and after routing. So when you have a new longest net after routing, you have to go back, and change the target to match that longest net. If you have already done the delays, all your work is blown up, because you matched to a net that wasn't truly the longest.

Has anyone found a better way to manage this?

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  • CarlD

    Thank you Mike! Your first suggestion is exactly what I was looking for. cheers!

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  • CarlD

    Thank you Mike! Your first suggestion is exactly what I was looking for. cheers!

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