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Unformatted text preview: ECE 210/211 Analog Signal Processing Fall 2011 University of Illinois Basar, Franke,
Peck, Trick Exam 1 Tuesday, Sept. 20, 201 l — 7:008:15 PM Name: Section: . 9 AM IO AM 1 PM 2 PM
(curcle one) Class: . ECE 210 ECE 21 1
(circle one) Please clearly PRINT your name IN CAPITAL LETTERS and circle your section in the boxes
above. This is a closed book and closed notes exam. Calculators are not allowed. Please show all your
work. Backs of pages may be used for scratch work if necessary. All answers should include
units wherever appropriate. Problem 1 (25 points)
Problem 2 (25 points) Problem 3 (25 points) Problem 4 (25 points) Total (100 points) Problem 1 (25 points) (a) In the following circuit, ﬁnd the load resistor RL which will absorb maximum power. 29 2i
10v (b) Find Re between a and b. a
0 Re F b 20 20 20 20 (c) Find i in the following circuit. 12V (d) In the circuit below, the maximum power delivered on RL is W.
ZQ 1Q
ZQ 1A RL Problem 2 (25 points) (a) In the following circuit, using the principle oflinearity and superposition, we can write the
node voltage V as v = Av,+ Bll+ CI2 Use source suppression to ﬁnd the constants A, B, and C. (b) In the following circuits, find the open circuit votage Vat, and the short circuit current lSC
between a and b. 4V Q 1 ix 29 21‘ 29
4 B SC Problem 3 (25 points) For the op amp conﬁguration shown, determine the requested quantities. Assume linear regime
(ideal opamp) operation. 75K (a) h =________mA (b) In terms ofIabeled voltages V0] and/or V02, write the mathematical expression for current l2.
Draw a box around the equation you wish to be graded. (c) In terms of labeled voltages V0] and/or V02, write the mathematical expression for current I}.
Draw a box around the equation you wish to be graded. (d) Using the results of (b) and (c), write the mathematical expression for ll in terms of labeled
voltages V0. and/or V02. You do not need to simplify your equation. Draw a box around the
equation you wish to be graded. (e) In terms of labeled voltages V0. and/or V02, write the mathematical expression for current lit
Draw a box around the equation you wish to be graded. (1') Using the output circuit attached to the rightmost op amp, write a second equation relating
labeled voltages V0. and V02. You do not need to simplify your equation. Draw a box
around the equation you wish to be graded. Problem 4 (25 points) The given circuit is in the steady state for t < O. (3) Find t: 0 ic
ic(0‘) = 109% +
M 2A 15:2 0.1F vc(t)
v40") = “Q J '
(b) Find
ic(0+) =
vc(0+) = (c) For t > O the time constant (d) Find the steady state values of ic(t) and vc(t) when the switch is closed. I 9‘ 55 II V C. 55 ll (e) Below sketch ic(t) and vc(t) in the range t 6 (0,00). Label numerical values on the axes. ic(t) Vc(t) ...
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This note was uploaded on 04/04/2012 for the course ECE 210 taught by Professor Staff during the Spring '08 term at University of Illinois, Urbana Champaign.
 Spring '08
 Staff

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