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How can I plot amplitude and phase responses of a CIC filter?

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soso maths
soso maths 2019-5-19
回答： Edson Silva 2020-7-24
I'm trying to plot amplitude and phase responses of a CIC filter (Cascaded integrated Comb filters), given M,R and N. Here is the z transfer function.
https://en.wikipedia.org/wiki/Cascaded_integrator%E2%80%93comb_filter

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Edson Silva
Edson Silva 2020-7-24
CIC1 = dsp.CICDecimator(8,1,3);
h=fvtool(CIC1,'Fs',sampling_frequency);
h.NormalizeMagnitudeto1 = 'on';

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