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1
ESE 372/Spring 2009
HW3
(problems are taken from recommended book)
Due: March 5
th
.
Part 1 (corrections to HW2)
D2.12.
Using an ideal op amp, what are the values of the resistors R1 and R2 to be used to
design amplifier with the closedloop gains listed below. In your design, use 10k
Ω
as a value of
one resistor. Value of the other resistor should be equal or larger than 10k
Ω
.
(a) 1V/V; (b) 2 V/V; (c) 0.5 V/V; (d) 100 V/V.
D2.33.
Assuming the op amp to be ideal, it is required to design the circuit below to implement
current amplifier with gain i_load/i_in=20 A/A.
(a) find the required value for R;
(b) if R
L
=1k
Ω
and the op amp operates in an ideal manner so long as V_out is in the range ±12 V.
What range of i_in is possible?
2.62.
For the circuit below express v_out as a function of v_1 and V_2. What is the input
resistance seen by v_1 alone? By v_2 alone? By a source connected between the two input
terminals?
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Part 2
2.84.
Op amp is characterized by a gainbandwidth product of 20MHz. It is operated with closed
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 Spring '08
 Kamoua,R

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