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Network TheoryNetwork Functions

If H(s)=1/(s+4), the causal impulse response is?

  • Ae^(-4t)u(t)
  • B4e^(-t)u(t)
  • C1-e^(-4t)
  • Ddelta(t-4)
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Correct Answer: A. e^(-4t)u(t)
Explanation: The inverse Laplace transform of 1/(s+a) is e^(-at)u(t), so h(t)=e^(-4t)u(t).
Reference: Standard network theory: impulse response numerical
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