1
GATE EE 2000
Subjective
+2
-0
An active filter consisting of an op-amp, resistor $${R_1},\,\,{R_2},\,\,{R_3}$$ and two capacitors of value $$C$$ each, has a transfer function
$$T\left( s \right) = {{{{ - s} \over {\left( {{R_1}C} \right)}}} \over {{s^2} + {{2s} \over {\left( {{R_3}C} \right)}} + {1 \over {\left( {R{R_3}{C^2}} \right)}}}}$$
where, $$R = {R_1}||{R_2}$$
If $${R_1} = 2k\Omega ,{R_2} = 2/3\,k\Omega ,\,\,{R_3} = 200\,k\Omega$$ and $$C = 0.1\,\,\mu F,$$ determine the center frequency $${\omega _0},$$ gain $${A_0}$$ and the $$Q$$ of the filter.
2
GATE EE 2000
+1
-0.3
An analog electronic circuit that measures $$rms$$ value of the input voltage by averaging the square of the instantaneous voltage level, responds slowly to changes in the input signal due to
A
the ''square'' function built into the circuit
B
the ''square-root'' function built into the circuit
C
the averaging function built into the circuit
D
none of the above
3
GATE EE 2000
Subjective
+5
-0
A current amplifier has an input resistance of $$10\Omega ,$$ an output resistance of $$10\,\,k\Omega$$ and a Current gain of $$1000.$$ It is feed by a current source having a source resistance of $$10$$ $$k\Omega$$ and its output connected to a $$10\,\,k\Omega$$ load resistance. Find the voltage gain and the power gain
4
GATE EE 2000
+1
-0.3
Feedback control systems are
A
insensitive to both forward and feedback path parameter changes.
B
less sensitive to feedback path parameter changes than to forward path parameter changes.
C
less sensitive to forward-path parameter changes than to feedback path parameter changes.
D
equally sensitive to forward and feedback path parameter changes.
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