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effective length variation after Monte Carlo trial

inessadm

Hi, when I run a Monte Carlo analysis in Cadence Spectre-v 6.1.3 (process only), I'm looking for the variation effect
on each nominal length (L effective) of the circuit's transistors.  I find only the varied process data corresponding to
a particular run but nothing about width or length chosen for a trial !
Is there any way to do this please ?
Another question : what the meaning of process data as wd108, wd015, and so on ?
Thank you.

Parents
  • Quek
    Hi inessadm

    You can print the actual values of the statistical parameters as follows:
    a. In ADE-XL results tab, switch to "Detail" view
    b. Right mouse click at the value column and select "Print Statistical Parameters"

    I am afraid that it is a little hard to guess what "wd108" means. Perhaps you might want to look in the PDK documentation or provide more details on where they are found (in model file, in spectre netlist, etc). If it is one of the parameters that appear in the statistical section of your model file, then it is simply a parameter that the foundry uses for varying the characteristics of a device during monte carlo. Foundry customer support should be able to provide more info on this.

    Best regards
    Quek
Reply
  • Quek
    Hi inessadm

    You can print the actual values of the statistical parameters as follows:
    a. In ADE-XL results tab, switch to "Detail" view
    b. Right mouse click at the value column and select "Print Statistical Parameters"

    I am afraid that it is a little hard to guess what "wd108" means. Perhaps you might want to look in the PDK documentation or provide more details on where they are found (in model file, in spectre netlist, etc). If it is one of the parameters that appear in the statistical section of your model file, then it is simply a parameter that the foundry uses for varying the characteristics of a device during monte carlo. Foundry customer support should be able to provide more info on this.

    Best regards
    Quek
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