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>My understanding is that Bessel filter best preserves
>the waveform and has little ringing and overshoot. It
>is interesting what one gets if he cascades Bessel
>filters... T3 is cascaded EMA's, but EMA is 1-st order
>Bessel filter. What about higher order?
What you get is more lag, and you still don't get a flat passband
with a Bessel. The nice thing about this critically-damped
Butterworth is that it doesn't have a lot of lag, has a flat
passband, and decent attenuation of high frequencies.
-Alex
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