Generating an IIR filter

When you generate an IIR filter, Embed calculates the polynomial coefficients for the transfer function with the desired frequency characteristics. If the Discrete option is activated when you press the IIR button, the filter will be designed in the discrete domain. For good fixed-point performance, it is recommended that the Discrete option is de-activated before designing the filter.

To generate an IIR filter

1.    Click Calc Filter to calculate the filter coefficients. The coefficients will be displayed in the Num (numerator) and Den (denominator) boxes.

2.    Click Done to close the IIR Filter Setup dialog box and transfer the filter numerator and denominator coefficients to the Transfer Function Setup dialog box.