GATE Electronics and Communications (EC) 2014 Shift 1 Solved Paper

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Question : 31 of 65

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Consider the feedback system shown in the figure. The Nyquist plot of G(s) is also shown. Which one of the following conclusions is correct?

G(s) is an all-pass filter
G(s) is a strictly proper transfers function
G(s) is a stable and minimum phase transfer function.
The closed-loop system is unstable for sufficiently large & positive K.

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