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How to include variable in PSS command

sjwprcker 6 months ago

Hi, I am using command in .scs file to run pss simulation as

-> pss pss fund=10k harms=1200 errpreset=conservative tstab=100u annotate=status

this pss simulation is fine

if I change the fund value to a variable as

-> pss pss fund=VAR("freq_swp") harms=1200 errpreset=conservative tstab=100u annotate=status

the log reports that VAR is not known by spectreRF.

However, if I use VAR("freq_swp") in the GUI based PSS setting window, it passes.

Is there any solution to do so in command format?

Andrew Beckett 6 months ago

VAR("freq_swp") is ADE syntax for passing variables. With Spectre, this just translates into a global (top-level in the netlist) parameter called "freq_swp" which would be defined at the top of the netlist typically (although the order doesn't matter):

parameters freq_swp=10k

and then in the analysis statement it would be:

pss pss fund=freq_swp harms=1200 errpreset=conservative tstab=100u annotate=status

Andrew
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sjwprcker 6 months ago in reply to Andrew Beckett

Hi Andrew, that is cool, thanks a lot!
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