Numerical exercise on OP-AMP

1. Numerical Exercise on Operational Amplifier
Dr. Varun Kumar
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1. In Figure 1, let Z = 10kΩ and Z0
= 100kΩ for a given input voltage 10mV and
supply voltage VCC = 15V . Find out the following
(a) Output voltage Vo and current I.
(b) Repeat (a), when Z = 100Ω and Z0
= 1MΩ
Figure 1:
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1

2. 2. Express the output voltage in terms of given input voltages that has been shown
in Figure 2.
Figure 2:
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3. Express the output voltage in terms of given input voltages that has been shown
in Figure 3.
Figure 3:
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2

3. 4 Find out the output voltage vo that has been shown in Figure 4. Here, R = 10kΩ
and C = 1µF.
Figure 4:
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5. Find out the output voltage vo that has been shown in Figure 5. Here, R = 10kΩ
L = 1mH, and C = 1µF. Hint: Resonant circuit
Figure 5:
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3

4. 6. In Figure 6, find out the output voltage vo under given condition .
(a) When applied voltage across control gate is high.
(b) When applied voltage across control gate is low.
Figure 6:
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4