1
GATE ECE 2006
MCQ (Single Correct Answer)
+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 GATE ECE 2006 Analog Circuits - Operational Amplifier Question 37 English

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
2
GATE ECE 2006
MCQ (Single Correct Answer)
+2
-0.6
The diagonal clipping in Amplitude Demodulation (using envelope detector) can be avoided if RC time-constant of the envelope detector satisfies the following condition, (here W is message bandwidth and ωc is carrier frequency both in rad/sec)
A
$$\mathrm{RC}\;<\frac1{\mathrm W}$$
B
$$\mathrm{RC}\;>\frac1{\mathrm W}$$
C
$$\mathrm{RC}\;<\frac1{{\mathrm\omega}_\mathrm c}$$
D
$$\mathrm{RC}\;>\frac1{{\mathrm\omega}_\mathrm c}$$
3
GATE ECE 2006
MCQ (Single Correct Answer)
+2
-0.6
A zero-mean white Gaussian noise is passed through an ideal low-pass filter of bandwidth 10 kHz. The output is then uniformly sampled with sampling period ts = 0.03 msec. The samples so obtained would be
A
correlated
B
statistically independent
C
uncorrelated
D
orthogonal
4
GATE ECE 2006
MCQ (Single Correct Answer)
+2
-0.6
The following question refer to wide sense stationary stochastic process:

It is desired to generate a stochastic process (as voltage process) with power spectral density

$$$S\left( \omega \right) = {{16} \over {16 + {\omega ^2}}}$$$

By driving a Linear-Time-Invariant system by zero mean white noise (as voltage process) with power spectral density being constant equal to 1. The system which can perform the desired task could be

A
first order lowpass R-L filter
B
first order highpass R-c filter
C
tuned L-C filter
D
series R-L-C filter
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