Ee105 fall 2013 lecture 18 slide 6 prof ming c wu 3

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Unformatted text preview: 3 Prof. Ming C. Wu CS Gain Varia1on with Channel Length Av = W L ∝ 2µ nCoxWL λ ID ID 2µ nCox §༊  Since λ is inversely propor1onal to L, the intrinsic voltage gain actually becomes propor1onal to the square root of L. EE105, Fall 2013 Lecture 18 – Slide 6 Prof. Ming C. Wu 3 MOS Biasing R1 VDD = VGS + I D RS R1 + R2 1 W 2 I D = µnCox (VGS − VTH ) 2 L 2 unknows (VGS , I D ), 2 equations ⇒ ⎛ྎ R V ⎞ྏ VGS = − (V1 − VTH ) + V12 + 2V1 ⎜ྎ 2 DD − VTH ⎟ྏ ⎝ྎ R1 + R2 ⎠ྏ 1 V1 = W µnCox RS L §༊  Voltage at X is determined by VDD,...
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