$ /james/notes/dsp

Main image for Cascaded integrator–comb (CIC) filters

Cascaded integrator–comb (CIC) filters

CIC filters are computationally efficient implementations of narrowband lowpass filters. They are particularly suited for use as an anti-aliasing filter when decimating or an anti-image filter when interpolating. CIC filters are well suited for implementation in FPGAs and ASICs as they only require addition and subtraction operations and not multiplication.