(a) An n-channel MOSFET has an electron mobility of (450 mathrm{~cm}^{2} / mathrm{V}-mathrm{s}) and a channel length...

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(a) An n-channel MOSFET has an electron mobility of \(450 \mathrm{~cm}^{2} / \mathrm{V}-\mathrm{s}\) and a channel length of \(1.2 \mu \mathrm{m}\). Let \(V_{G S}-V_{T N}=0.5 \mathrm{~V}\). Determine the cutoff frequency \(f_{T}\).

(b) Repeat part (a) if the channel length is reduced to \(0.18 \mu \mathrm{m}\).

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