1
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
2
GATE EE 2015 Set 1
+1
-0.3
Consider the circuit shown in the figure. In this circuit $$R = 1\,\,k\Omega ,$$ and $$C = 1\,\,\mu F.$$ The input voltage is sinusoidal with a frequency of $$50$$ $$Hz,$$ represented as a phasor with magnitude $${V_i}$$ and phase angle $$0$$ radian as shown in the figure. The output voltage is represented as a phasor with magnitude $${V_0}$$ and phase angle $$\delta$$ radian. What is the value of the output phase angle $$\delta$$ (in radian) relative to the phase angle of the input voltage?
A
$$0$$
B
$$\pi$$
C
$$\pi /2$$
D
$$- \pi /2$$
3
GATE EE 2015 Set 1
+1
-0.3
Of the four characteristics given below, which are the major requirements for an instrumentation amplifier?
P. $$\,\,\,\,$$High common mode rejection ratio
Q. $$\,\,\,\,$$High input impedance
R. $$\,\,\,\,$$High linearity
S. $$\,\,\,\,$$High output impedance
A
P, Q and R only
B
P and R only
C
P, Q and S only
D
Q, R and S only
4
GATE EE 2014 Set 3
+1
-0.3
An operational-amplifier circuit is shown in the figure.

The output of the circuit for a given input $${V_i}$$ is

A
$$- \left( {{{{R_2}} \over {{R_1}}}} \right){V_i}$$
B
$$- \left( {1 + {{{R_2}} \over {{R_1}}}} \right){V_i}$$
C
$$\left( {1 + {{{R_2}} \over {{R_1}}}} \right){V_i}$$
D
$$+ {V_{sat}}\,\,$$ or $$- {V_{sat}}\,\,$$
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