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Altera_Forum's avatar
Altera_Forum
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15 years ago

how to design a low pass digital filter with smallest delay

Hello, All I want to design a digital filter with the cutoff frequency 20Hz. The sampling frequency of my acquiring system is very high, up to 8192 Hz. The important requirement is the de...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

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I don't want to use the inverse model of the filter to cancel the delay.

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I assume, you can't cancel the delay even if you want.

Group delay is a characteristic parameter of a filter, it can't be changed at will. You get the lowest with a low order Bessel filter. But it depends on your filter characteristic requirements.