As my previous thread in this group became more or less off topic after a while, I start this new one with a related but different question: I now can perform pole zero analysis with ngspice (using the command line mode). I'm trying to _plot_ the pole zero diagram like this: source inputfile run plot pole(1) pole(2) ylimit -1 1 xlimit -10 0
I hoped to see the poles displayed with an "x" and the zero with an "o" Unfortunately that seems not the way to do it. I _do_ get a grid with the correctly scaled axis but I can't distinguish the poles and zeroes on it. Is this possible with ngspice?
regards, hugo
here is the inputfile: test vin 1 0 ac 1 r1 1 2 1 c1 2 0 1 r2 1 3 1 c2 3 2 1 .print ac v(3) .ac dec 20 1m 10k .end