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Which response would provide a higher stability?(a) A step signal(b) A ramp signal(c) A sinusoidal(d) 1/(s-1)This question was addressed to me during an internship interview.Query is from Impulse Response topic in division Control System Applications of MATLAB

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The CORRECT ANSWER is (d) 1/(s-1)

For explanation: All the first THREE options are unstable since their ROC doesn’t include the imaginary axis. For option 1/(s-1), the POLE lies in the left half of s-plane and the R.O.C. includes the imaginary axis.



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