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FIGURE 6.6
The transfer function of a prototype bandpass filter. Top panel: Plot of the gain curve as
function of the normalized frequency. Bottom panel: Plot of the phase curve as function of
the normalized frequency.

FIGURE 6.7
The filtering action of a prototype bandpass filter. Top panel: Input signal consists of a
combination of a fundamental frequency signal (equal to the frequency corresponding to
the filter maximum gain) and two of its harmonics. Bottom panel: Filtered signal.

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