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A novel class of selective Cascaded Integrator-Comb(CIC) FIR filters with passband compensation

A novel class of CIC FIR filter functions has been developed recently which preserves the simpleness of classical CIC FIR filters by avoiding multipliers but shows improvement in stopband attenuation. In this paper, a compensator filter has been used to reduce the passband droop of the novel class of CIC filter functions. The compensator performs effectual compensation using three additions/subtractions. Examples are shown to compare the passband response of novel class of CIC filters and novel class of compensated CIC filters. Comparison between stopband attenuation of classical CIC filter functions and the novel class of compensated CIC filter functions is also shown through these examples.