Midterm1AS05

# Midterm1AS05 - EE 307A S05 CLOSED BOOK 1 Cheat Sheet State...

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V OUT M 1 M 2 V IN V DD = 2.5 V EE 307A S05 MIDTERM EXAM #1 Braun CLOSED BOOK + 1 Cheat Sheet State assumptions and show work. Print Your Name: SOLUTIONS No unauthorized help given or received. Signature: Braun Unless stated otherwise, please use the following transistor parameters for ALL problems: V TN = - V TP = 0.5 V, λ = 0 V -1 , -2 φ F = 0.6 V, γ = 0.0 V 1/2 , and = 0 V -1 . Assume that body connections of all NMOS transistors are grounded and PMOS bodies go to + V DD . 1. NMOS inverter. k 1 = 150 A/V 2 , k 2 = 10 A/V 2 . A) Determine the value of V OH for the inverter. Explain. V OH = V DD V TN = 2.5 V – 0.5 V = 2.0 V M 2 can pull V OUT up until M 2 turns off at one V T below V DD . B) For the design changes in the following table, indicate how each change would influence the logic swing of the inverter. Explain. Logic swing = V OH V OL = 2.0 V – 0.43 V = 1.57 V Increase Logic Swing Decrease Logic Swing No Change EXPLAIN 1. Increase (W/L) 1 Higher (W/L) 1

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## This note was uploaded on 06/01/2008 for the course EE 307 taught by Professor Braun during the Spring '08 term at Cal Poly.

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Midterm1AS05 - EE 307A S05 CLOSED BOOK 1 Cheat Sheet State...

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