1
GATE ECE 2007
+2
-0.6
Consider the OP-Amp circuit shown in the figure.

If $${V_i} = {V_1}\,\,\sin \left( {\omega \tau + \phi } \right),$$ then the minimum and maximum values of $$\phi$$ (in radians) are respectively

A
$$- \pi /2\,\,and\,\,\pi /2$$
B
0 and $$\pi /2$$
C
$$- \pi$$ and 0
D
$$- \pi /2\,\,$$ and 0
2
GATE ECE 2006
+2
-0.6
For the circuit shown in the following figure, the capacitor C is initially uncharged. At t = 0, the switch S is closed. The voltage VC across the capacitor at t = 1 millisecond is

In the figure shown above, the OP-AMP is supplied with $$\pm$$ 15V.

A
0 Volts
B
6.3 Volts
C
9.45 Volts
D
10 Volts
3
GATE ECE 2005
+2
-0.6
In an ideal differential amplifier shown in the figure, a large value of (RE).
A
increases both the differential and common-mode gains.
B
increases the common-mode gain only.
C
decreases the differential-mode gain only.
D
decreases the common-mode gain only
4
GATE ECE 2005
+2
-0.6
The voltage e0 indicated in the figure has been measured by an ideal voltmeter. Which of the following can be calculated?
A
Bias current of the inverting input only.
B
Bias current of the inverting and non-inverting inputs only.
C
Input offset current only.
D
Both the bias currents and the input offset current.
EXAM MAP
Medical
NEET