Plot P/Z

Fig. 21 shows a typical view of the P/Z tab for plotting poles and zeros, here, an elliptical filter (IIR) is shown.

Screenshot of the P/Z tab

Fig. 21 Screenshot of the P/Z tab

Optionally, the magnitude frequency response can be plotted around the unit circle to show the influence of poles and zeros (Fig. 22).

Screenshot of the P/Z tab with hf

Fig. 22 Screenshot of the P/Z tab with overlayed H(f) plot

Development

More info on this widget can be found under plot_pz.