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Extract single net from layout

drdanmc

I've recently been spending some time trying to really understand how some power and ground meshes were done in a layout.  I've been using probing in Layout-XL with the Net Probe Hierarchy Level set to 32 because I want to see all the metal and vias on any level.  Unfortunately what I'm seeing is that this is *slow*.  Probably because it is a large and complex layout.  I'm wondering if there is a better way.  I've wondered about writing a custom DRC deck for PVS to try and pull out a single named net using some of the connectivity based rules and then just load back this layout.  Still, I wonder if there is a better/easier way what won't involve me writing PVS code (which I generally prefer to avoid).  If I have to go the DRC route, does anyone have a simple example of pulling out a net from a layout (probably only using metal/vias for connectivity) and writing back to a stream file that I could stream into a single net cell?

As it currently stands, it takes 15-30 seconds to move/zoom, etc with the probes on.

Thanks

-Dan

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  • Andrew Beckett

    Dan,

    I'd expect that to be fast - the benefit is that all the connectivity is already available. Are you using IC617? One other thing to try is the new Connectivity->Net Tracer that's in VLS XL.

    I'd certainly suggest you talk to customer support to look at the performance issue. I don't think it should be necessary to use PVS for this - either the probing or the net tracer should be the best way to solve this problem.

    Regards,

    Andrew.

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  • Andrew Beckett

    Dan,

    I'd expect that to be fast - the benefit is that all the connectivity is already available. Are you using IC617? One other thing to try is the new Connectivity->Net Tracer that's in VLS XL.

    I'd certainly suggest you talk to customer support to look at the performance issue. I don't think it should be necessary to use PVS for this - either the probing or the net tracer should be the best way to solve this problem.

    Regards,

    Andrew.

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