On 12/08/2024 11:07, Steve Hageman wrote:
> One clarification - On Stacking the digital filters - the bandwidth
> does not narrow - I misspoke. Naturally being a Hardware Guy I forgot
> that the digital filters do no load each other, like analog filters can.
>
> (I should never type before two cups of coffee in the morning -
> forgive me). ;-)
>
>
Actually, considering the quick flow-graph below, using a
complex-low-pass as a symmetric bandpass, you can see that
doubling-up the same filter produces much more out-of-band
attenuation, but also slightly-steeper "skirts".
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