Should the filter frequency response contain magnitude greater than 3dB in magnitude?
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Should the filter frequency response contain magnitude greater than 3dB in magnitude at why axis?
Below is the frequency response of filter. As one can see that the magnitude is in power of 10^-6. IS this design correct?
Is it possible to have low magnitude?
Can one conclude the roll off?
Please clarify my doubts
Chunru on 22 Sep 2021
if you have 10^-6 dB or lower, then the response is almost flat in amplitude. The design or something else is most likely wrong if you are not design a all-pass filter. To further check the problem, you may want to post the code to produce the plot.