Study of low sensitivity property of delta operator based sampled-data filters

A study has been undertaken to illustrate the low sensitivity property of sampled-data filters designed using delta operator (in /spl gamma/-domain). First, a closed form sensitivity result has been derived that clearly shows the advantage of the pole sensitivity using /spl gamma/-domain formulation. The magnitude sensitivity with respect to coefficient changes in /spl gamma/ and z domain transfer functions is studied for 1-D and 2-D filters. The results clearly illustrate the advantages in designing using delta operator.