BB_Lecture32 Part 1 NoiseMarginParameters_1

BB_Lecture32 Part 1 NoiseMarginParameters_1 - EE 311...

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1 EE 311 Lecture 32 Part 1 Wednesday March 31, 2010 CMOS Inverter th ed.) CMOS Inverter Transition Times Fall-Time from High to Low Rise-Time from Low to High Propagation Delay Time from High to Low Propagation Delay Time from Low to High
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2 W p = ( μ n / μ p 29 W n ≈ (2 to 3) x W n μ n (W n / L n ) = μ p (W p / L p ) V tn = |V tp | = V t
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3 Noise Margin Parameters V IL IH Formally define V IL as point on VTC with Slope = -1 Q N P in triode region ] ) ( 2 1 ) |)( | [( ) ( 2 1 | | ) ( ' ) ( ' 1 ] ) ( 2 1 ) |)( | )[( ( ' ) )( ( ' 2 1 2 2 2 2 O DD O DD tp i DD tn I tp tn p p p n n n O DP O DN DP DN O DD O DD tp i DD p p p DP tn i n n n DN v V v V V v V V v V V L W K L W K v i v i i i v V v V V v V L W K i V v L W K i - - - - - = - = = - = = = - - - - - = - = Differentiate with respect to v i O DD DD o DD tp i tn i O DD tp i DD O DD tn i I O I O O DD I O tp i DD O DD
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BB_Lecture32 Part 1 NoiseMarginParameters_1 - EE 311...

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