A closed-loop system is shown below. The noise transfer function (frac{C_{n}(s)}{N(s)}left[C_{n}(s)= ight.) output corresponding to noise
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A closed-loop system is shown below. The noise transfer function \(\frac{C_{n}(s)}{N(s)}\left[C_{n}(s)= \right.\) output corresponding to noise input \(\mathrm{N}(\mathrm{s})\) ] is approximately:
(a) \(\frac{1}{\mathrm{G}(s) \mathrm{H}_{1}(s)}\) for \(\left|\mathrm{G}(s) \mathrm{H}_{1}(s) \mathrm{H}_{2}(s) \right| \)
(b) \(-\frac{1}{\mathrm{H}_{1}(s)}\) for \(\left|\mathrm{G}(s) \mathrm{H}_{1}(s) \mathrm{H}_{2}(s) \right|>>1\)
(c) \(-\frac{1}{\mathrm{H}_{1}(s) \mathrm{H}_{2}(s)}\) for \(\left|\mathrm{G}(s) \mathrm{H}_{1}(s) \mathrm{H}_{2}(s) \right|>>1\)
(d) \(-\frac{1}{\mathrm{G}(s) \mathrm{H}_{1}(s) \mathrm{H}_{2}(s)}\) for \(\left|\mathrm{G}(s) \mathrm{H}_{1}(\mathrm{~s}) \mathrm{H}_{2}(\mathrm{~s}) \right|\)
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