If the unit step response of a network is (1 - e^-αt) then its unit impulse response is
- A. α e^-αt
- B. (1 - α^-1) e^-αt
- C. α^-1 e^-αt
- D. (1 - α) e^-αt
Answer: A. α e^-αt
Explanation: The unit impulse response h(t) is the time derivative of the unit step response s(t): h(t) = d/dt [1 − e^(−αt)] = α·e^(−αt).