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1

### GATE EE 1997

A major advantage of active filters is that they can be realized without using
A
OP-amps
B
Inductors
C
Resistors
D
Capacitors
2

### GATE EE 1996

Let the magnitude of the gain in the inverting op - amp amplifier circuit shown be $$x$$ with switch $${S_1}$$ open. When the switch $${S_1}$$ is closed, the magnitude of gain becomes.
A
$$x/2$$
B
$$-x$$
C
$$2$$ $$x$$
D
$$-2$$ $$x$$
3

### 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
4

### 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 $${V_i}$$
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