Question
Asked Oct 15, 2019

Two parts to this question, please answer both. Thank you. Assume that even though the supply voltages are not shown, the op-amp remains in the linear region of operation.

 

Exercise 4.8.6
Determine vo and the power dissipated in R in the circuit below.
5 ΚΩ
(a)
2 V
7 kΩ
3 ΚΩ
w
2 ΚΩ
4 ΚΩ 2kΩ RL
3 k2
4 V
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Exercise 4.8.6 Determine vo and the power dissipated in R in the circuit below. 5 ΚΩ (a) 2 V 7 kΩ 3 ΚΩ w 2 ΚΩ 4 ΚΩ 2kΩ RL 3 k2 4 V

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Expert Answer

Step 1

The given circuit is redrawn as shown in Figure 1.

5 kΩ
7 ΚΩ
Vn
2 V
3 kΩ
-+
2 ΚΩ
RL2 k
4 k
4 V
3 k2
Rea
Figure
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5 kΩ 7 ΚΩ Vn 2 V 3 kΩ -+ 2 ΚΩ RL2 k 4 k 4 V 3 k2 Rea Figure

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Step 2

Apply KCL to the non-inverting terminal of the amplifier.

-4 -0
0
2 ΚΩ 3kΩ
4
0
3000
2000
2000
1
1
2000 3000
2000
5000
4
6x106
2000
6x106
4
2000 5000
v 2.4 V
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-4 -0 0 2 ΚΩ 3kΩ 4 0 3000 2000 2000 1 1 2000 3000 2000 5000 4 6x106 2000 6x106 4 2000 5000 v 2.4 V

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Step 3

Apply KCL to the inverting ter...

у —у
п
5 kΩ
0 =
7 kn
2
п
п
0
5000
7000 7000
5000
1
1
2
7000
5000
5000 7000
12000
2
35х106
5000
7000
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у —у п 5 kΩ 0 = 7 kn 2 п п 0 5000 7000 7000 5000 1 1 2 7000 5000 5000 7000 12000 2 35х106 5000 7000

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