2006Spring-Midterm2 - University of California at Berkeley...

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1 University of California at Berkeley College of Engineering Dept. of Electrical Engineering and Computer Sciences EE 105 Midterm 2 Spring 2006 Prof. Ming C. Wu April 6, 2006 Guidelines Closed book and notes. Two pages of information sheets allowed. Total time = 90 minutes
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2 (1) For the circuit shown in Fig. 1, W/L = 2 for both M 1 and M 2 , no x C μ = 100 μ A/V 2 , λ = 0.05 V -1 , V Tn = 1V, V DD = 5V. a) [5 pt] Find the DC drain current at M 2 when V OUT = 3V. Use λ = 0 for this part. b) [5 pt] Find the DC gate bias (V G ) of M 2 such that the DC output voltage V OUT = 3V. Use λ = 0 for this part. c) [5 pt] Draw the small-signal equivalent circuit. Find the values of all circuit elements in the small signal circuit (e.g., g m , r 0 , …). d) [5 pt] Find the voltage gain, / Vo u t s Avv = . e) [5 pt] Find the output resistance of the circuit (both expression and numeric value). f) [5 pt] Find the input resistance, and construct the two-port model of this voltage amplifier.
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2006Spring-Midterm2 - University of California at Berkeley...

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