any info about parametric dc sweep ?
for ex: want to plot gm/id vs vgs of a device
and vgs is parameter not a voltage source
I tried let and alterparam but ngspice gives two errors:
1- vector vgs is not available or has zero length
2- wrong format in alterparam line
is there a simpler way to do this sweep ? or what's wrong here ?
Thanks all!
@Stefan Schippers