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EE_331Sp_2009_-_HW8S - EE 331 Devices and Circuits I...

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1 EE 331 Devices and Circuits I Spring 2009 Problem #8 Solution 6.70 a   V H V DD | I DS I DL | K n ' W L S V DD V TNS V L 2 V L K n ' 2 W L L V TNL 2 For ratioed logic, both V H and V L are independent of K n ' . V H 2.5 V | V L = 0.2 V However, I D K n ' | I DS 80 A 80 100 64 A | P = 2.5 V 64 A 0.160 mW b   V H 2.5 V V L = 0.2 V I DS 80 A 120 100 96 A | P = 2.5 V 96 A 0.240 mW 6.82 80 A = 100 A W L A 2.5 0.6 0.1 2 0.1 W L A 4.32 1 V TNB 0.6 0.5 0.1 0.6 0.6 0.631 80 A = 100 A W L B 2.5 0.1 0.631 0.1 2 0.1 W L A 4.65 1 7.1 K n ' n C ox " n ox T ox n 3.9 o T ox 500 cm 2 V sec 3.9 8.854 x 10 14 F / cm
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