Pole-zero analysis issues.


To ng-spice-devel@ieee.ing.uniroma1.it
From Paolo Nenzi <pnenzi@ieee.ing.uniroma1.it>
Date Fri, 16 Jun 2000 18:30:44 +0200 (CEST)
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Arno (and ohters),

I gave a llok at the PZ analysis, the code is very confusing (I did not
understood how it is supposed to work). To test it against some "trusted"
code. In Vladimirescu's SPICEbook there is a t-bridge filter:

BRIDGE-T FILTER
V1 1 0 12 AC 1
C1 1 2 1U
C2 2 3 1U
R3 2 0 1K
R4 1 3 1K
*
.OP
.PZ 1 0 3 0 VOL PZ
.PRINT PZ ALL
*
.END


The simulation aborted without giving any result.
This filter has two poles and two zeroes.

Paolo


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