kannan2590
Member level 4
what are the advantages of integrating at higher sampling rate and for comb filters lower sampling rate in cic filters
Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
Since Z-domain transfer function of CIC filter is:
where
N=order of filter
M=Differential Delay (usually M=1 or 2)
R=Decimation Factor
So while implementing CIC as decimation filter Integrator is followed by Down Sampler and then by Comb filters, the advantage is that now you need only "M" delay elements as compared to "M*R" required for earlier implementations which results in less area and low power consumption. As shown in following figure: (Note: M=1 in figure)
View attachment 81204
Hope this is helpful.