Signal processing
**Package**

This part is relative to the design of IIR filter using the zeros and poles method. In the present state of development, the following functions are implemented:

- only 4 poles and 4 zeros are possible (the amount of zeros being LE than the amount of poles),
- only the frequency response is available,

To use the applet, the following steps have to be followed:

- Choice of the parameters (click on the "Saisie des pôles" button to enter poles and/or "Saisie des zéros" to enter the zeros values), the parameters can be chosen either by the mouse (clicking in the unit circle) or by the hand (add the real part and the imaginary part of the pole in the bottom left, then select the "Ajouter pôle" or the "Ajouter zéro" button).
- Clicking on the "Spectre fréquentiel" button allows the display of the frequency response.

The sources of the applet are available (4 sources and the relative classes):

IIRdesign.zip