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
Answer:A
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
Explanation: For an FIR filter, when M is odd, the real valued frequency response of the FIR filter Hr(ω) has the characteristic that Hr(0)=0. A zero response at zero frequency is just the condition that the differentiator should satisfy.