# sky130

Connie Duong

01/04/2022, 5:14 PM
Where can I find the transistor spice models for the sky130A pdk? I am looking for parameters like threshold voltage, Rds, Con, Coff. I tried looking through the file but didn't find anything?

Tim Edwards

01/04/2022, 5:16 PM
Should be in
👍 1

Connie Duong

01/04/2022, 5:51 PM
Thanks! I found it. However, in each spice file there's many models for the same fet? For instance, nfet_01v8 there's model.0, model.1....model.4. How do I know which one ngspice is using when running the simulations?


01/04/2022, 6:29 PM
Each of the models is valid for a certain range of l/w values. This is a parameter for each model.

Laxman Chinnannavar

01/24/2023, 4:48 AM
Hey @Connie Duong, what is the parameter name in the .spice file related to Threshold voltage?

Connie Duong

01/26/2023, 4:41 AM
the threshold voltage depends on the sizing of your transistor and i usually print it after using it in my schematic and running the netlist in ngspice. In an ngspice terminal, you use the command "show m : vth" to see the threshold voltage of each transistor. make sure to have spaces before and after the colon