# Analog Filter Characteristics MCQ’s

This set of Digital Signal Processing Multiple Choice Questions & Answers (MCQs) focuses on “Analog Filter Characteristics”.

1. The zeros of type-2 class of chebyshev filters lies on ___________

a) Imaginary axis

b) Real axis

c) Zero

d) Cannot be determined

2. What is the transfer function of magnitude squared frequency response of the normalized low pass Butterworth filter?

a) 11+(s/j)−2N

b) 1+(sj)−2N

c) 1+(sj)2N

d) 11+(sj)2N

3. The magnitude square response shown in the below figure is for which of the following given filters?

a) Butterworth

b) Chebyshev

c) Elliptical

d) None of the mentioned

4. Type-2 chebyshev filters consists of ______________

a) Only poles

b) Both poles and zeros

c) Only zeros

d) Cannot be determined

5. What is the order of a low pass Butterworth filter that has a -3dB bandwidth of 500Hz and an attenuation of 40dB at 1000Hz?

a) 4

b) 5

c) 6

d) 7

6. Bessel filters exhibit a linear phase response over the pass band of the filter.

a) True

b) False

7. Which of the following is the band edge value of |H(Ω)|^{2}?

a) (1+ε^{2})

b) (1-ε^{2})

c) 1/(1+ε^{2})

d) 1/(1-ε^{2})

8. Which of the following is true about the magnitude square response of an elliptical filter?

a) Equi-ripple in pass band

b) Equi-ripple in stop band

c) Equi-ripple in pass band and stop band

d) None of the mentioned

9. Which of the following is false about the type-2 chebyshev filters?

a) Monotonic behavior in the pass band

b) Equi-ripple behavior in the stop band

c) Zero behavior

d) Monotonic behavior in the stop band

10. What is the equation for the magnitude square response of a low pass Butterworth filter?

a) 11+(ΩΩC)2N√

b) 1+(ΩΩC)2N

c) 1+(ΩΩC)2N√

d) None of the mentioned

11. What is the order of the type-2 chebyshev filter whose magnitude square response is as shown in the following figure?

a) 2

b) 4

c) 6

d) 3

12. Which of the following defines a chebyshev polynomial of order N, T_{N}(x)?

a) cos(Ncos^{-1}x) for all x

b) cosh(Ncosh^{-1}x) for all x

c)

`cos(Ncos`^{-1}x), |x|≤1
cosh(Ncosh^{-1}x), |x|>1

d) None of the mentioned

13. Which of the following is true about type-1 chebyshev filter?

a) Equi-ripple behavior in pass band

b) Monotonic characteristic in stop band

c) Equi-ripple behavior in pass band & Monotonic characteristic in stop band

d) None of the mentioned

14. Low pass Butterworth filters are also called as _____________

a) All-zero filter

b) All-pole filter

c) Pole-zero filter

d) None of the mentioned

15. The frequency response shown in the figure below belongs to which of the following filters?

a) Type-1 chebyshev

b) Type-2 chebyshev

c) Butterworth

d) Elliptical

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