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HW12_Solutions

# HW12_Solutions - → 1.58 v I-V TN 29 = V DD-v I V TP a 29...

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Homework Solutions ECE302 Spring 2007 HW 12 1 7.6 (a) V H = 2.5 V, V L = 0 V (b) Same as (a). V H and V L don't depend upon W/L in a CMOS gate. 7.16 For the NMOS device +5 V 1.5 mA 0.6 V + - ( 29 1 10 . 6 10 5 . 1 6 . 0 2 6 . 0 6 . 0 5 10 100 3 6 = = - - - - n n L W x L W x For the PMOS device +5 V 60 μ A 2.6 V + - 40 x 10 - 6 ( 29 W L p 5 - 0.6 - 2.6 2 2.6 = 6 x 10 - 5 W L p = 1 5.37 7.25 t r 2245 3.6 R onP C = 3.6 C K p V GS - V TP = 3.6 0.2 pF ( 29 5 4 x 10 - 5 ( 29 - 3.3 + 0.75 = 1.41 ns t f 2245 3.6 R onN C = 3.6 C K n V GS - V TN ( 29 = 3.6 0.2 pF ( 29 2 10 - 4 ( 29 3.3 - 0.75 ( 29 = 1.41 ns t PLH = 1.2 R onP C = t r 3 = 0.470 ns t PHL 2245 1.2 R onN C = t f 3 = 0.470 ns t P = 0.470 + 0.470 2 = 0.470 ns

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