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Analog Circuits
»
Analog circuits miscellaneous
» Question
Analog circuits miscellaneous
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Analog Circuits
Analog circuits miscellaneous
For the op-amp circuit shown in figure, the voltage gain A
v
= v
0
/ v
i
is ________
– 4
8
4
– 8
Correct Option:
D
0 - v
i
+
0 - v
1
= 0
R
R
⇒ v
1
= -v
i
Now
v
1
- 0
+
v
1
- v
2
+
v
1
= 0
R
R
R
⇒ 3v
1
= v
2
∴ v
2
= -3v
i
∴
v
2
- v
1
+
v
2
+
v
2
- v
0
= 0
R
R
R
⇒ – 3v
i
+ v
i
– 3v
i
– 3v
i
= v
0
⇒
v
0
= -8
v
i
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