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.



Did I miss anything else in the inv.cfg file ?