@Luis Henrique Rodovalho I think you can create a custom file

mycorners.lib

like this:

* mycorners lib file
.lib mycorners
.param MC_MM_SWITCH=0
.param MC_PR_SWITCH=0
.param corner_factor=1
.param process_mc_factor=1
.param mismatch_factor=1

.include continuous/parameters_fet_XX.spice
.include continuous/parameters_res_YY.spice
.include continuous/parameters_cap_ZZ.spice

* Include the model files
.include continuous/models_global.spice
.include continuous/models_fet.spice
.include continuous/models_bjt.spice
.include continuous/models_diodes.spice
.include continuous/models_resistors.spice
.include continuous/models_capacitors.spice

* Legacy discrete models (RF, vpp caps, SONOS, and SRAM)
.include corners/XX.spice
.include corners/XX/specialized_cells.spice
.include rescap/res_YY__cap_ZZ.spice
.include rescap/res_YY__cap_ZZ__lin.spice
.endl mycorners

where: •

XX

can be

tt

,

ss

,

ff

,

fs

,

sf

•

YY

and

ZZ

can be

nom

,

low

,

high

. "`nom`" replaced with "`typical`" in the rescap lines. also in all include lines you must give the correct path for the various files, unless you place this file in the same directory as

sky130.lib.spice

Then you call this file in the testbench with:

.lib /path/to/mycorners.lib mycorners

Thanks, Stefan! I'll try that in my sims.

I need to add all the possible corner permutations to

sky130.lib.spice

. I had originally avoided doing this because ngspice was reading all of the entries in the file before selecting the one specified in the

.lib

argument, and every entry would slow down ngspice's startup time significantly. That got fixed, so now it makes sense just to define every single permutation.