arash rezaee
Member level 5
Hi every one. I used FDATOOL to generate chebyshev 2 IIR filter with sampling rate of 95KHz and clock frequency of 12.160MHz. I want to pass frequency from 0 to 15 KHz and stop it at 18KHz. From magnitude response of FDATOOL every thing is fine and it pass up to 15KHz with 0dB when attenuate for higher frequency. I generate HDL code with help of matlab and then use it in my project. But when the input is from 1Hz to 9KHz every thing is fine but above 9KHz it is not stable. why? Another question is, Is it better to design IIR filter ot FIR filter for audio processing?
Regards
Arash
Regards
Arash