HW3_sol

HW3_sol - 5 Since 1 L = constant L When L=1um = 0.02V-1...

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5 5. Since L 1 λ , λ L = constant When L=1um, λ= 0.02V -1 When L’=3um, 00667 . 0 3 02 . 0 1 ' ' = × = = u u L L In this question, we assume the transitor operates in saturation region when V DS =1V. Also, we need to consider the Channel Length Modulation Effect. (a) By () ) 1 ( 2 1 2 DS t GS OX D V V V L W C I μ + = () () () ) ' 1 ( ' 1 ) ' 1 ( 2 1 ) ' 1 ( 2 1 1 2 1 2 2 2 1 2 DS DS DS t GS OX DS t GS OX D D V V V V V L W C V V V L W C I I + + = + + = ) 1 )( 3 / 02 . 0 ( 1 ) 5 )( 3 / 02 . 0 ( 1 80 2 + + = u I D uA I D 1192 . 82 2 = when V DS = 5V (b) % 100 I of change % 1 1 2 D × = D D D I I I % 649 . 2 % 100 80 80 1192 . 82 = × = u u u (c) Since V DS is fixed at 5V, the only way to reduce the percentage change is by increasing L. 1 1 1 1 2 2 1 D D new D D D I I I I I I =
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This note was uploaded on 11/28/2011 for the course ELEC 202 taught by Professor ? during the Fall '11 term at HKUST.

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HW3_sol - 5 Since 1 L = constant L When L=1um = 0.02V-1...

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