Introduction Consider the first-order IIR digital filter y[n]=ay[n-1]+x[n] When implemented on a digital machine, the filter coefficient o can assume only certain discrete values approximating the original design value aIntroduction • Consider the first-order IIR digital filter y[n]= αy[n-1]+x[n] α ^ • When implemented on a digital machine, the filter coefficient α can assume only certain discrete values approximating the original design value α