HW6Solutions - Homework 6 Solutions 1 a 1 = 1k gm1 = 1mS =...

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Homework 6 Solutions 1. a. R out = 1 g m 1 = 1 k " # g m 1 = 1 mS = 2 μ n C ox W L I D W L " # $ % & 1 = g m 1 2 2 μ n C ox I D = 1 m 2 2 ( 50 μ ( 100 μ = 100 b. I 2 I 1 = W L ( ) 2 W L ( ) 1 " W L ( ) 2 = I 2 W L ( ) 1 I 1 = 300 μ # 100 100 μ = 300 c. r o = 1 " I D = 1 0.03 # 300 μ = 111.1 k $ 2. a. W L " # $ % & 1 = I out 1 W L ( ) R I ref = 40 μ ( 10 2 ( ) 100 μ = 4 2 ( ) = 2 b. W L " # $ % & 2 = I out 4 W L ( ) R I ref = 100 μ ( 10 2 ( ) 100 μ = 10 2 ( ) c. W L " # $ % & 3 = I out 3 W L ( ) 4 I out 1 = 250 μ ( 10 2 ( ) 40 μ = 31.25 3a.
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b. To make V o = 0V, let I D 1 = I BIAS , so I D 1 = μ n C ox W L 2 V SG " V Tp ( ) 2 # V SG = 2 $ I D 1 μ n C ox W L + V Tp = 2 $ 100 μ 25 μ $ 20 3 + 0.7 = 1.8 V V BIAS = V
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