eee4343_midterm-I_spring10

# eee4343_midterm-I_spring10 - t | = 0.5V Assume that the...

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1 EEE-4343 Midterm - I January 28, 2010 (11:00 am – 12:15 pm) Open-books, open-notes, in-class exam (calculators ok, but no computers) Name: _________________________________________________________ SID: _________________________________________________________ 1. Consider an NMOS transistor with μ n C ox = 100 μA/V² , V t = 0.5V, and W/L = 10, What regions the transistor is operating under when (a) V GS = 4V and V DS = 1V (b) V GS = 4V and V DS = 4V? Find the drain current of the each condition above? (20%) 2. Calculate the total charge stored in the channel of an NMOS transistor having C ox = 5 fF/μm² , L = 0.2 μm , and W= 2 μm , threshold voltage V t = 0.5V , and operated at the V GS = 0.8V and V DS = 0V (20%) 3. In the circuit below, the NMOS transistor has the threshold voltage of |V

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Unformatted text preview: t | = 0.5V. Assume that the MOSFET parameter V A = 1/ Î» = 40V, operating at the drain voltage V D = 2V. What region is the transistor operating in? What is the voltage gain v o /v i ? (20%) 2 4. For the NMOS amplifier below, replace the transistor with its T equivalent circuit, assuming that V DD = V SS = 5V, Î» = 0, R D = 10 K â„¦ , Rs = 20 K â„¦ , and g m = 1 mA/V . What are the voltage gains of v s / v i and v d / v i , respectively? (20%) 5. Consider the following circuit, V t = 0.5V, Î¼ n C ox = 80 Î¼A/VÂ² , Î» = 0 with channel length of 1 Î¼m. Find the required values of channel width for each of Q 1 , Q 2 , and Q 3 to obtain the voltage and current values indicated. (20%)...
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eee4343_midterm-I_spring10 - t | = 0.5V Assume that the...

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