Hi anyone know can I to change value of w w is width of a MO

Question

Hi anyone know can I to change value of w w is width of a MOSFET the dowhile work but the graphics are all same

Ryan Wans · Answer

i think it is something like `alter name of fet width = 2`

Ryan Wans · Answer

where 2 is the width you want

Juan Andres · Answer

No it doesn t worked

Ryan Wans · Answer

Refer to the Ngspice manual on the alter command then

Stefan Schippers · Answer

< U03CSQTGFM2> i also have many times tried to do this i have tried using alter altermod alterparam no one worked I think the only way is running multiple simulations one size at a time

Stefan Schippers · Answer

< U01QTMG2K8R> the correct way should be `alter m xm2 msky130 fd pr nfet 01v8 W= 0 4 + run 0 1 ` assuming `run` is a loop parameter 1 2 3 10 `xm2` is the nmos in the schematic It does not work `Error no model available for w= 5 0000000e 01 l= 1 5000000e 07 ` I have also tried to scale down the alter assignment by 1e 6 `alter m xm2 msky130 fd pr nfet 01v8 W= 4e 7 + run 1e 7 ` This also didn t work These are the things i tested some time ago after all the failures i decided this is not possible to do with ngspice

Juan Andres · Answer

Thanks

Stefan Schippers · Answer

< Juan Andres> may be if you have time try to submit this basic needed functionality to they may probably figure out how to write the dowhile loop to do the task If you get the work done please let me know