Classical IIR Filter Design

The Classical IIR Filter Design (Fig. 1) panel is used to design classical IIR digital filters. These filters include the
classic types such as lowpass, highpass, bandpass, and the classic designs such as Butterworth, Chebyshev, Inverse
Chebyshev, and Elliptic. The IIR Design panel consists of a graphical interface with the Magnitude vs Frequency
cursors and plot on the left side and a text-based interface with digital controls on the right side. You design classical
IIR filters by adjusting the filter specifications on the panel. You design the passband and stopband requirements
either by using the text entry or the cursors in the Magnitude vs Freqeuncy graph. As the cursors are moved, the text
entries are updated accordingly.