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Design >> Analog Design >> anti-aliasing filter for ADCs
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Message started by polyam on Oct 1^st, 2019, 6:25am

Title: anti-aliasing filter for ADCs
Post by polyam on Oct 1^st, 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

Title: Re: anti-aliasing filter for ADCs
Post by Andrew Beckett on Oct 4^th, 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...