Andrew Beckett
Senior Fellow
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Life, don't talk to me about Life...
Posts: 1742
Bracknell, UK
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I agree with Art. The chances are (I can't remember without looking at the PDK) that the spectre view has 4 terminals - the fourth being the bulk, which is an inherited connection.
It's quite possible that the Diva rules only extract 3 pins, and so using the symbol (which is what you're supposed to use in the schematic) will solve this problem.
That's my guess, anyway.
Ah, I've just realised that this error probably comes from the extraction, not the LVS, in which case the above theory wouldn't explain it (although it's probably a problem you'll hit further down the line).
Most likely your bipolar layouts do not match the way that the device is being recognised. I thought that the PDK came with layouts (not pcells though) for the bipolars - if not, I'd have thought sample layouts would be available from TSMC?
Regards,
Andrew.
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