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1

### GATE EE 1996

A non inverting op - amp amplifier is shown in figure. The o/p voltage is
A
$${3 \over 2}\,\,\sin 100t$$
B
$$3\,\sin 100t$$
C
$$2\,\sin 100t$$
D
None of these
2

### GATE EE 1995

Fill in the Blanks
The common mode voltage of a unity gain (voltage follower) op-amp buffer in terms of its output voltage $${V_0}$$ is __________.

$${V_0}$$ or $${V_i}$$
3

### GATE EE 1994

Fill in the Blanks
Given figure, shows a non - inverting op - amp summer with $${V_1} = 2\,V$$ and $${V_2} = \, - 1V.$$ The output voltage $${V_0} = \_\_\_\_\_$$

$$1$$ $$V$$
4

### GATE EE 1992

MCQ (More than One Correct Answer)
An ideal op-amp is used to make an inverting amplifier. The two input terminals of the op-amp are at the same potential because
A
The two input terminals are directly shorted internally
B
The input impedance of the op-amp is infinity
C
The open-loop gain of the op-amp is infinity
D
$$CMRR$$ is infinity.
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