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Altera_Forum
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10 years ago

Trouble with CIC filter

I'm trying to implement a CIC decimation filter( with R = 1000, M = 1 and N = 2 ) and Fs = 1 MHz without using the CIC IP core. Using matlab implementation I found out that the suppression of the CIC...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

without diving too deep you are implementing M as 2 as you are delaying extra:

I believe below is for M = 1

integrator_out_1 <= (l_data_in) +integrator_out_1;

i.e. just acccumulator