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anti-aliasing filter for ADCs (Read 212 times)
polyam
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anti-aliasing filter for ADCs
Oct 01st, 2019, 6:25am
 
Hi,

I have a very basic question. Do we need to use anti-aliasing filter (AFF) when SIMULATING Nyquist rate ADCs and switched capacitor sigma delta ADCs?

How important is it to have AAF in simulation and chip measurement?
Please elaborate.
Thanks
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Andrew Beckett
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Re:  anti-aliasing filter for ADCs
Reply #1 - Oct 4th, 2019, 7:28am
 
Presumably this depends on what you're simulating or measuring. If all your input frequencies are below the Nyquist rate, then it's not necessary to include the anti-aliasing filter. If you potentially have significant signal levels at frequencies above the Nyquist rate, or are trying to assess the effectiveness of your anti-aliasing filter, then yes you would...
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