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Homework #3

# Homework #3 - for V i from 0V to 10V in the circuit-6V V o...

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Page 1 of 3 The Hong Kong University of Science and Technology Department of Electronic and Computer Engineering E LEC 101 BASIC ELECTRONICS F ALL 2009 HOMEWORK#3 Due date: Dec 9 7, 2009 (Monday, 5:00pm) Q1. Assuming that the switch has been in position 1 for a long time, at time t = 0 the switch is moved to position 2. Calculate the current i(t) for t > 0. (ans: mA e t 2 . 0 222 . 0 ). 6k 100 μF + - 3k 2V 1 2 i(t) v(t) + - t=0 Q2. Find the i 1 (t) for t > 0, when the switch opens at t = 0. (ans: A e t 9 ). + - 12 12V i 1 (t) t=0 6 2H 1 Q3. In the figure, it shows a zener diode voltage regulator circuit (V z = 7V, r z = 10 Ω ). [ans: (a) 7.029V] (a) Determine the output voltage if V i = 10V. (b) Plot V o as the function of V i for 0 < V i < 15V, + - V i 1k V o

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Page 2 of 3 Q4. (a) Plot V o and (b) I o as a function of V i
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Unformatted text preview: , for V i from 0V to 10V in the circuit. +-6V V o 10V V i 4k Ω ideal diode ideal diode I o Q5. Find the V 2 . [ans: -1.42V] +-V 2 +-5V 1k +-3V 1k 2k Piecewise linear (PL) diode model [r D =10, V F =0.4] Ideal Op-amp Q6. Find Z AB in the figure. [ans: 4.41 + j7.35 Ω] . (No need to hand-in)-10j Ω 3 Ω-15j Ω 5j Ω 3 Ω 10j Ω A B Z AB Page 3 of 3 Q7. Use Thevenin’s theorem to find i o (t) in the network. [ans: 4.11 cos(100t + 7.47 ° )A] (No need to hand-in) 3cos(100t+45 °)Α 40mH 3 Ω i o (t) 2 Ω 1mF 4sin(100t-30 °)Α Q8. Find I o in the circuit using nodal analysis (node voltage analysis). [ans: 1.93 ∠ 52.12 ° A] (No need to hand-in) 2 Ω 10j Ω 4 Ω 1 ∠−90°Α-3j Ω 3 Ω I o 2∠0°Α...
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Homework #3 - for V i from 0V to 10V in the circuit-6V V o...

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