hw3_sol_04-03-03-10-11

# hw3_sol_04-03-03-10-11 - B E Boser Homework 3 Solution...

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B. E. Boser Homework 3 Solution Spring 2004 Problem 1 + = + = + = * 2 * 1 1 1 2 1 2 1 2 1 2 1 1 4 1 1 4 ) ( 1 4 V V g T k g g g T k g g g T k v m B m m m B m m m B ieq γ γ γ The input referred noise shows the inherent tradeoff in sizing. Looking at noise alone, you would want to increase V 2 * . But increasing V 2 * cuts down on the output range. Maximizing dynamic range requires an understanding of this tradeoff between noise and output swing.

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hw3_sol.mcd Page 2 of 3 S BJT R x ( 29 4.002 nV Hz = S MOS R s ( 29 4.002 nV Hz = R x 6.338k = R x root S MOS R s ( 29 S BJT R s ( 29 - ( 29 10 20 R s , = R s 24.991k = R s β V t I o = S BJT R s ( 29 2 q e I o R s 2 1 β 1 β V t R s I o + β 2 + = v i R s i b i c 1 r π R s + β + = R s i b i c 1 β R s g m + β + = R s i b i c 1 β V t R s I o + β +
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