Design and Properties of New Cic Fir Filter Functions

In this paper, a new design of the CIC (Cascaded-Integrator-Comb) FIR (Finite Impulse Response) filter functions is presented by spreading the delays in the comb stages. In order to validate theoretical design, a few test examples are designed for different filter parameters. The superiority of the new CIC filter functions is established by comparing these novel CIC FIR architectures with existing classical CIC structures. The new filter functions maintain simplicity of FIR filters by avoiding multipliers, but show excellent performances versus classical CIC filter functions. They have the same level of constant group delay, as well as number of delay elements, but the new designed functions give higher insertion losses in stopband, as well as they have higher selectivity.