Hi, have you get your answer? I am a beginner of this field. I am in a
project that have to use the CIC filter. The gain of the filter also puzzle me a
lot. In matlab, I could just divide by 1/gain(CIC) before or after the CIC to
scale the gain of this filter to 0 dB. But I don't know how to implement it in
verilog or in the hardware. Also I don't know whether is it necessary.
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>  Hi everyone,  
>I have a 3rd order CIC comb filter with decimation ratio of 16. The  
>freq response of the filter shows a gain of 60 dB. How do I scale  
>the gain of this filter to 0 dB? Do I minus 1000 from each of the  
>coefficients of the filter, Hz?  
>One of the paper I read uses a power of two scaling prior to data  
>entering the filter. Can somebody explain what is that mean?  
>Thank you,  
>EngGan  
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