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Setting Up An Analysis<br />

Pole Zero Analysis<br />

Pole-Zero Analysis Output<br />

FNS Model<br />

Pole-Zero Analysis Output<br />

This topic details the results generated by a pole-zero analysis, and lists the steps that can be<br />

taken—when running the analysis in interactive mode—to simplify the results.<br />

Tip<br />

You can view pole-zero analysis results with the AMS Results Browser.<br />

The first result is the impression of all the roots found for the circuit, ordered by magnitude, but<br />

with zeros divided in negative and positive real parts, as shown here for a typical example:<br />

Poles Modulus Real Part Imaginary Part<br />

1 6.264953E+00 -6.264953E+00 0.000000E+00<br />

2 3.853866E+06 -3.824006E+06 -4.788095E+05<br />

3 3.853866E+06 -3.824006E+06 4.788095E+05<br />

4 4.396770E+06 -4.396770E+06 0.000000E+00<br />

5 5.423444E+06 -5.423444E+06 0.000000E+00<br />

6 6.554762E+06 -3.126871E+06 -5.760866E+06<br />

7 6.554762E+06 -3.126871E+06 5.760866E+06<br />

8 6.584083E+06 -5.150248E+06 -4.101840E+06<br />

9 6.584083E+06 -5.150248E+06 4.101840E+06<br />

10 1.343013E+07 -1.343013E+07 0.000000E+00<br />

11 1.531050E+07 -1.531050E+07 0.000000E+00<br />

12 2.217833E+07 -2.217833E+07 0.000000E+00<br />

13 4.927351E+07 -4.927351E+07 0.000000E+00<br />

14 6.564085E+07 -6.564085E+07 0.000000E+00<br />

15 1.228260E+08 -1.228260E+08 0.000000E+00<br />

Zeros Modulus Real Part Imaginary Part<br />

1 3.853866E+06 -3.824006E+06 -4.788095E+05<br />

2 3.853866E+06 -3.824006E+06 4.788095E+05<br />

3 4.396770E+06 -4.396770E+06 0.000000E+00<br />

4 5.423444E+06 -5.423444E+06 0.000000E+00<br />

5 6.435558E+06 -5.867538E+06 -2.643560E+06<br />

6 6.435558E+06 -5.867538E+06 2.643560E+06<br />

7 6.554762E+06 -3.126871E+06 -5.760866E+06<br />

8 6.554762E+06 -3.126871E+06 5.760866E+06<br />

9 1.343013E+07 -1.343013E+07 0.000000E+00<br />

10 1.531050E+07 -1.531050E+07 0.000000E+00<br />

11 2.217833E+07 -2.217833E+07 0.000000E+00<br />

12 6.564085E+07 -6.564085E+07 0.000000E+00<br />

13 1.228260E+08 -1.228260E+08 0.000000E+00<br />

14 3.857487E+06 3.857487E+06 0.000000E+00<br />

15 2.908742E+09 2.908742E+09 0.000000E+00<br />

At this point it is possible to simplify the results since, in practice, many poles and zeros will be<br />

output, and some of them will be almost superimposed giving a negligible resultant effect.<br />

Moreover, sometimes the circuit will work in a well-determined frequency range over which we<br />

Eldo® User's Manual, 15.3 233

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