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Question: The parameters of n- channel E-MOSFET are $k = 0.2 mA/v^2, \lambda = 0.01V^{-1}, V_T = 1.2 V$ Calculate the output resistance for i) $V_{GS} = 2V$ ii) $V_GS = 4V$
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Subject: Electronic Devices and Circuits II

Topic: Introduction to MOSFET

Difficulty: Low

edc2(34) • 171 views
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 modified 7 months ago  • written 10 months ago by
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Given : VT = 1.2V, k = 0.2 mA/v2 , λ = 0.01v-1

1) When VGS= 2V

IDQ = k [(VGS - VT )2 ]

IDQ = 0.2 ×10-3[(2 – 1.2 )2]

IDQ = 1.28 × 10-4 A

ro = 1/(λ IDQ )

ro = 1/((0.01×1.28 ×10^(-4)))

ro =781.250KΩ

2) When VGS= 4V

IDQ = k [(VGS - VT )2 ]

IDQ = 0.2 ×10-3[(4 – 1.2 )2]

IDQ = 1.568× 10-3 A

ro = 1/(λ IDQ )

ro = 1/((0.01×1.568×10^(-3)))

ro = 63.775KΩ

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 written 7 months ago by
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