Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
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

If you can show, how to implement a filter with 8192 Hz sampling rate, 81 taps and 20 Hz cutoff frequency, I'll agree. I fear, it's not feasible, however. Considering the relation between FIR filter frequency characteristic and FFT clarifies, why.