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Assigning a net name from schematics

bharath2k4er

 Hi All,

 

        Recently i came accross a requirement to assign net names to all the nets from schematics..Is this possible to do in skill..? Pls provide me some inputs to work on..

 

Ex: For an inverter i/p net name is A & o/p is B in sch

                Layout also should have the netname A to the input & B to the output

 

 Thanks,

Bharath. 

Parents
  • Andrew Beckett

    Hi Bharath,

    Virtuoso Layout Suite XL is connectivity-aware. It has an extractor which is triggered by any changes to the layout, and will continuously re-extract the layout connectivity, following rules in the tech file as to how things are supposed to be connected.

    There's also a "binder" which takes care of figuring out which devices and nets are which between the schematic and layout. If you like, it's an on-line LVS. With IC613/IC614 this binder is much smarter than it was in IC5141 (which relied on the instance names matching between schematic and layout).

    You could of course write your own extractor (hard enough - although there have been some other threads recently talking about this - Derek has made some particularly useful appends on this subject), but you'd also have to get it to LVS too to match the extracted nets with the schematic. You may be able to use information from whatever LVS tool you are using to aid with this.

    But it seems a lot of work to do when there's a tool already which does this!

    Regards,

    Andrew.

Reply
  • Andrew Beckett

    Hi Bharath,

    Virtuoso Layout Suite XL is connectivity-aware. It has an extractor which is triggered by any changes to the layout, and will continuously re-extract the layout connectivity, following rules in the tech file as to how things are supposed to be connected.

    There's also a "binder" which takes care of figuring out which devices and nets are which between the schematic and layout. If you like, it's an on-line LVS. With IC613/IC614 this binder is much smarter than it was in IC5141 (which relied on the instance names matching between schematic and layout).

    You could of course write your own extractor (hard enough - although there have been some other threads recently talking about this - Derek has made some particularly useful appends on this subject), but you'd also have to get it to LVS too to match the extracted nets with the schematic. You may be able to use information from whatever LVS tool you are using to aid with this.

    But it seems a lot of work to do when there's a tool already which does this!

    Regards,

    Andrew.

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