# HW9sol10 - ECE2280 Homework #9 Spring 2010 Use the figure...

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ECE2280 Homework #9 Spring 2010 Use the figure below to solve for problems 1-3. For DC analysis, assume that the capacitors act as an open, the BJT is active and the Mosfet is saturated. 1. (a) Solve for the DC values: i. I diode ii. Bias voltage for M1 iii. V B iv. V out (b) Prove or disprove that the BJT is active and the Mosfet is saturated. (c) Create a rough sketch of the total waveform seen at Vout given V in stated above, if V out /V in =- 30V/V. Make sure to label all relevant y-axis values (maximum, minimum, etc.). Assume D1 and D2 are on. + ~ + + + + + + 2 C C 3 4 C 5 C 2 C 10 F μ 2k Ω 1 C 1 F μ B V 10V 2mA 1mF 15V 2V 1.6k +5V 8.7V -15V 1K M1 1.4k Ω diode I 1k Ω 2k Ω 10 F μ 20mF 10mF 1k Ω 100 Ω 200 Ω 1 D 2 D + x V 0 in V 3.7V 1.4k Ω 500 Ω 6 C out V L R 10k = Ω 1mA 200 Ω 3.7V Use: ignore r o, |V BE |=0.7, β =99 V t =1V (threshold V) k n ’(W/L)=2mA/V 2 λ =0 V DO =0.7V n=2 V T =25mV (Thermal V) V in = 7+0.003sin(30t)

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2. Draw the AC small-signal equivalent circuit(use hybrid-

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## This note was uploaded on 01/24/2011 for the course ENGR 3700 taught by Professor Kal during the Spring '10 term at Utah State University.

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HW9sol10 - ECE2280 Homework #9 Spring 2010 Use the figure...

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