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LVS Matching error

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Hi everybody
I'm using Diva from Cadence to run LVS.
I get many nets and devices mismatch when running an LVS. This is due to M factor of mos transistor, and also because I draw my MOS transistors in Layout using multifingered design. I thought LVS didn't recognize parallel device, but
I checked DivaLVS.rul file and parallel simplification seems to be set by permuteDevice statement. (permuteDevice parallel "nfet")......)
Have anyone been faced to this problem and could help me resolve this???

any help will be very appreciated thanks!!!!


Originally posted in cdnusers.org by isazul
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  • Well, it rather depends on what the function that is being used in the permuteDevice() is doing. This will be a SKILL function, and it needs to take into account the w, l and m of the transistors being combined appropriately, otherwise you'll get parameter mismatches. If it only looks at w and l, then it's not going to work properly...

    Regards,

    Andrew.


    Originally posted in cdnusers.org by adbeckett
Reply

  • Well, it rather depends on what the function that is being used in the permuteDevice() is doing. This will be a SKILL function, and it needs to take into account the w, l and m of the transistors being combined appropriately, otherwise you'll get parameter mismatches. If it only looks at w and l, then it's not going to work properly...

    Regards,

    Andrew.


    Originally posted in cdnusers.org by adbeckett
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