Digital Signal Processing Multiple Choice Questions and Answers

Questions

1 How is the frequency response of an ideal differentiator related to the frequency?

A Inversely proportional

B Linearly proportional

C Quadratic

D None of the mentioned

View Answer

Answer:Linearly proportional

2 Which of the following is the frequency response of an ideal differentiator, Hd(ω)?

A -jω ; -π ≤ ω ≤ π

B -jω ; 0 ≤ ω ≤ π

C jω ; 0 ≤ ω ≤ π

D jω ; -π ≤ ω ≤ π

View Answer

Answer:jω ; -π ≤ ω ≤ π

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3 The ideal differentiator ahs which of the following unit sample response?

A Symmetric

B Anti-symmetric

C Cannot be explained

D None of the mentioned

View Answer

Answer:Anti-symmetric

4 If h_d(n) is the unit sample response of an ideal differentiator, then what is the value of h_d(0)?

A 1

B -1

C 0

D 0.5

View Answer

Answer:0

5 In this section, we confine our attention to FIR designs in which h(n)=-h(M-1-n).

A True

B False

View Answer

Answer:True

6 Which of the following is the condition that an differentiator should satisfy?

A Infinite response at zero frequency

B Finite response at zero frequency

C Negative response at zero frequency

D Zero response at zero frequency

View Answer

Answer:Zero response at zero frequency

7 Full band differentiators can be achieved with an FIR filters having odd number of coefficients.

A True

B False

View Answer

Answer:False

8 If f_p is the bandwidth of the differentiator, then the desired frequency characteristic should be linear in the range of _____________

A 0 ≤ ω ≤ 2π

B 0 ≤ ω ≤ 2f_p

C 0 ≤ ω ≤ 2πf_p

D None of the mentioned

View Answer

Answer:0 ≤ ω ≤ 2πf_p

9 What is the desired response of the differentiator in the frequency range 2πfp ≤ ω ≤ π?

A Left unconstrained

B Constrained to be zero

C Left unconstrained or Constrained to be zero

D None of the mentioned

View Answer

Answer:Left unconstrained or Constrained to be zero

10 What is the weighting function used in the design of FIR differentiators based on the chebyshev approximation criterion?

A 1/ω

B ω

C 1+ω

D 1-ω

View Answer

Answer:1/ω

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