Oh well. If it is not secret perhaps you could send me a copy of the file
and let me tinker it a bit. I might figure it out.
Can't find the original. Here's a simple file to play with, real poles
only, no zeros.
*pzexample.net
*3 real poles, no zeros
r1 1 2 1k
c1 2 0 1u
r2 2 3 10k
c2 3 0 100n
r3 3 4 100k
c3 4 0 1n
v 1 0 dc 0 ac 1
..pz 1 0 4 0 vol pz
..print pz all
..end
This is what it does in Berkeley 3f:
-- Circuit: *pzexample.net
Date: Sun Mar 17 11:48:01 2013
*pzexample.net
Pole-Zero Analysis Sun Mar 17 11:48:01 2013
--------------------------------------------------------------------------------
Index pole(1) pole(2)
--------------------------------------------------------------------------------
0 -1.011111e+04, 0.000000e+00 -1.363589e+03, 0.000000e+00
*pzexample.net
Pole-Zero Analysis Sun Mar 17 11:48:01 2013
--------------------------------------------------------------------------------
Index pole(3)
--------------------------------------------------------------------------------
0 -7.252998e+02, 0.000000e+00
CPU time since last call: 0.040 seconds.
Total CPU time: 0.040 seconds.
"For a successful technology, reality must take precedence
over public relations, for nature cannot be fooled."
(Richard Feynman)