I am using
http://asco.sourceforge.net/ to optimize a simple CMOS inverter for maximum output impedance.
However, from the .out file, I have zrout1 = 0.00000e+00 from= 1.00000e+03 to= 1.00000e+06
Running
ngspice inv.net does not give me any impression of zero impedance though.
![](https://i.imgur.com/KT9tc5l.png)
Did I miss anything else in the inv.cfg file ?