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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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40 to 80 dB is quite a range, it will ~double your filter size. you have an fpass, but how about an fstop? in other words what is the expected transition band of your filter

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Because it is a practical problem, there is not an exact value of fstop. I just hope it is very close to the cutoff frequency, for example, 28Hz.