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An NMOS is to be used as a digital switch in an IC circuit, and currently has the following properties: μn = 450×10−4 m2 V.s, Cox = 8.6×10−3 F m2, W = 0.72 μm, L = 0.18 μm, tox = 4 nm, Vtn = 0.8 V. a) State the mode of operation and the required voltage for rDS = 2 kΩ. b) Adjust the width of the channel to obtain rDS = 1 kΩ. c) Select a different tox to obtain rDS = 1 kΩ.

An NMOS is to be used as a digital switch in an IC circuit, and currently has the following properties: μn = 450×10−4 m2 V.s, Cox = 8.6×10−3 F m2, W = 0.72 μm, L = 0.18 μm, tox = 4 nm, Vtn = 0.8 V. a) State the mode of operation and the required voltage for rDS = 2 kΩ. b) Adjust the width of the channel to obtain rDS = 1 kΩ. c) Select a different tox to obtain rDS = 1 kΩ.

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An NMOS is to be used as a digital switch in an IC circuit, and currently has the following properties: μ n = 450 × 10 − 4 m 2 V . s , C o x = 8.6 × 10 − 3 F m 2 , W = 0.72 μ m , L = 0.18 μ m , t o x = 4 n m , V t n = 0.8 V . a) State the mode of operation and the required voltage for r D S = 2 k Ω . b) Adjust the width of the channel to obtain r D S = 1 k Ω . c) Select a different t o x to obtain r D S = 1 k Ω .

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