# Midterm2W05 - EE 306 W05 MIDTERM EXAM#2 CLOSED BOOK 1 Cheat...

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V OUT 2 k Ω D 2 D 1 D 3 R 2 V 2 = 3 V V 1 = 1 V 1 k Ω R 1 V DD = 5 V EE 306 W05 MIDTERM EXAM #2 Braun CLOSED BOOK + 1 Cheat Sheet State any assumptions and show all work. Print Your Name: SOLUTIONS No unauthorized help given or received. Signature: BRAUN FOR THE ENTIRE EXAM, UNLESS OTHERWISE SPECIFIED, USE: The CVD model for all diodes -- including breakdown diodes -- with V ON = 0.7 V & V Z = 6.2 V. For FETs, V TN = - V TP = 0.8 V, K N = 100 μ A/V 2 , K P = 50 μ A/V 2 , γ = 0 V 1/2 , λ = 0 V -1 . Show all work, state any assumptions, and test hypotheses. 1. Diode Circuit Please analyze the diode logic circuit shown using the constant voltage drop model with V ON = 0.7 V & V Z = 6.2 V. Determine the Q-point for each diode and the value of output voltage, V OUT . Hypothesize: D 2 & D 3 ON D 1 OFF Analyze: V OUT = V 3 - V ON2 + V ON3 = 3.0 V mA 1 k 2 V 3 - V 5 2 2 3 = Ω = - = = R V V I I OUT DD R D mA 3 . 2 k 1 V .7 0 - V 3 1 2 2 1 = Ω = - = R V V I ON R Since I D1 = 0 A , I D2 = I R1 – I D3 = 2.3 mA – 1 mA = 1.3 mA V D1 =V 1 ( V 2 – V ON2 ) = 1 V – 2.3 V = – 1.3 V Test: All diodes operate self-consistently.

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