Difference b/w iir and fir filters

1. IIR is infinite and used for applications where linear characteristics are not of concern.

 

2. FIR filters are Finite IR filters which are required for linear-phase characteristics.

3. IIR is better for lower-order tapping, whereas the FIR filter is used for higher-order tapping.

4. FIR filters are preferred over IIR because they are more stable, and feedback is not involved.

5. IIR filters are recursive and used as an alternate, whereas FIR filters have become too long and cause problems in various applications.