A second order low-pass filter has a high-end roll-off of A)20 dB/octave B)60 dB

Question

A second order low-pass filter has a high-end roll-off of A)20 dB/octave B)60 dB/octave C) 40 dB/decade D)6dB/decade An active filter that provides a constants output for input signals from fol to foh is called an ideal A)bandpass filter B)low-pass filter C)high-pass filter D) None of the above. This is a basic circuit. A)differentiator B)subtractor C)integrator D)two-input multiplier An active filter that provides a constant output for input signals above foh is called an ideal A)low-pass filter B) bandpass filter C) high-pass filter D) None of the above. The roll-off rate of a second order filter is A)60 dB/decade or 18 dB/octave B)20 dB/decade or 6 dB/octave C)40 dB/decade or 12 dB/octave D)0 dB/decade or 0 dB/octave

Explanation / Answer

2) Second order low pass filter has high end roll off of 40 dB/decade.

3) An active filter that produces constant output for non negative input signal from fol to foh is called an ideal low pass filter

4) The given circuit diagram is a Subtractor

5) A active filter whose output is present for input signal above from fol to foh is called an ideal high pass filter.

6) A active filter which provides output from dc to fol and pass no signal above the fol is called a band pass filter.

7) Roll off for second order filter is 40 dB/decade or 12 dB/octave which is double of first order Roll off

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