The gain specifications of a filter are 0.1 20 log 10 |H(e j )|

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The gain specifications of a filter are

− 0.1 ≤ 20 log10|H(e)| ≤ 0(dB) 0 ≤ ω ≤ 0.2 π

20 log10|H(e)| ≤ − 60(dB)           0.3π≤ω≤π

(a) Find the loss specifications for this filter.

(b) Design using MATLAB a Butterworth, a Chebyshev (using cheby1), and an Elliptic filters. Plot in one plot the magnitude response of the three filters, compare them and indicate which gives the lowest order.

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