1
GATE EE 2015 Set 2
Numerical
+1
-0
In the following circuit, the transistor is in active mode and $${V_C} = 2V.$$ To get $${V_C} = 4V,$$ we replace $${R_C}$$ with $${R_C}.$$ Then the ratio $$R{'_C}/{R_C}$$ is __________.
2
GATE EE 2015 Set 2
+1
-0.3
The filters $${F_1}$$ and $${F_2}$$ having characteristics as shown in figures $$(a)$$ and $$(b)$$ are connected as shown in Figure $$(c).$$

The cut-off frequencies of $$F1$$ and $$F2$$ are $${f_1}$$ and $${f_2}$$ respectively. If $${f_1}\, < \,{f_2},$$ the resultant circuit exhibits the characteristic of a

A
Band-pass filter
B
Band-stop filter
C
All pass filter
D
High-Q filter
3
GATE EE 2015 Set 2
Numerical
+1
-0
The operational amplifier shown in the figure is ideal. The input voltage (in Volt) is $${V_i} = 2\sin \left( {2\pi \times 2000t} \right).$$ The amplitude of the output voltage $${V_0}$$ (in Volt) is __________.
4
GATE EE 2015 Set 2
+2
-0.6
The saturation voltage of the ideal op-amp shown below is $$\pm 10\,V.$$ The output voltage $${V_O}$$ of the following circuit in the steady-state is
A
square wave of period $$0.55$$ $$ms.$$
B
triangular wave of period $$0.55$$ $$ms.$$
C
square wave of period $$0.25$$ $$ms.$$
D
triangular wave of period $$0.25$$ $$ms.$$
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