Active and Passive Filters – Exercise – 1

21. Filters with the ________ characteristic are useful when a rapid roll-off is required because it provides a roll-off rate greater than –20/dB/decade/pole.

(a) Butterworth
(b) Chebyshev
(c) Bessel
(d) Either Chebyshev or Bessel

Answer
Answer : (b)
Explanation
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22. A ________ filter rejects all frequencies within a specified band and passes all those outside this band.

(a) low-pass
(b) high-pass
(c) band-pass
(d) band-stop

Answer
Answer : (d)
Explanation
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23. A ________ filter significantly attenuates all frequencies below fc and passes all frequencies above fc.

(a) low-pass
(b) high-pass
(c) band-pass
(d) band-stop

Answer
Answer : (b)
Explanation
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24. The critical frequency is defined as the point at which the response drops ________ from the passband.

(a) –20 dB
(b) –3 dB
(c) –6 dB
(d) –40 dB

Answer
Answer : (b)
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25. Nota

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