Butterworth filter is a type of signal processing filter designed to have as flat frequency response as possible in the passband. It is also referred to maximally flat magnitude filter. Poles lied in the unit circle for both HPF and LPF butterworth filters, thus they are stabe.
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With increase in order of the filter, transition becomes steeper and hence distortion decreases.
ReplyDeleteWe used BLT method for design of the filter.
ReplyDeleteAs transition becomes steeper, the magnitude response of the filter approaches the magnitude response of an ideal filter.
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