1
EE 250 Winter 2010
University of Alberta
HOMEWORK 10
(due Mar 22
nd
, 2010)
Instructor : Karthik Shankar
[There are five problems in this assignment.
All problems have equal weightage.
Make sure your
answers show the work in solving the problem.
If the final answer is wrong, partial credit will be
provided if the work is shown to have made progress towards the solution.
Do not expect any credit
if the T.A. cannot logically follow what you have put on your submitted homework. Unless
otherwise mentioned, the opamps in the problems below are ideal]
1.
The figure below shows the circuit for a digitaltoanalog converter (DAC).
a)
R
f
is in kiloohms.
Find
v
o
b)
Find
R
f
so that
v
o
ranges from 0 to 12 V.
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2.
Design a circuit using one ideal opamp, whose output is
v
o
=v
1
+3v
2
2(v
3
+3v
4
)
where
v
1
, v
2
, v
3
and v
4
are four distinct voltages.
3.
Using 20 nF capacitors, design an active
broadband
bandpass filter
that has a lower cutoff
frequency of 2000 Hz, an upper cutoff frequency of 8000 Hz and a passband gain of 10 dB.
a)
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 Spring '10
 Shankar
 Lowpass filter, Digitaltoanalog converter, Karthik Shankar, lowpass Butterworth filter

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