1
GATE ECE 2015 Set 1
MCQ (Single Correct Answer)
+2
-0.6
The circuit shown in the figure has an ideal opamp. The oscillation frequency and the condition to sustain the oscillations, respectively, are GATE ECE 2015 Set 1 Analog Circuits - Operational Amplifier Question 28 English
A
$${1 \over {CR}}$$ and $$\,{R_1}\,\, = \,\,{R_2}$$
B
$${1 \over {CR}}$$ and $${R_1}\, = \,4{R_2}$$
C
$${1 \over {2CR}}$$ and $${R_1}\, = \,{R_2}$$
D
$${1 \over {2CR}}$$ and $${R_1}\,$$ = 4$${R_2}$$
2
GATE ECE 2015 Set 1
MCQ (Single Correct Answer)
+2
-0.6
A sinusoidal signal of 2 kHz frequency is applied to a delta modulator. The sampling rate and step-size $$\Delta $$ of the delta modulator are 20,000 samples per second and 0.1 V, respectively. To prevent slope overload, the maximum amplitude of the sinusoidal signal (in Volts) is
A
$${1 \over {2\pi }}$$
B
$${1 \over \pi }$$
C
$${2 \over \pi }$$
D
$$\pi $$
3
GATE ECE 2015 Set 1
Numerical
+2
-0
The transmitted signal in a GSM system is of 200 kHz bandwidth and 8 users share a common bandwidth using TDMA. If at a given time 12 users are talking in a cell, the total bandwidth of the signal received by the base station of the cell will be at least (in kHz) ___________________.
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4
GATE ECE 2015 Set 1
Numerical
+2
-0
The input X to the Binary Symmetric Channel (BSC) shown in the figure is ‘1’ with probability 0.8. The cross-over probability is 1/7. If the received bit Y = 0, the conditional probability that ‘1’ was transmitted is _______. GATE ECE 2015 Set 1 Communications - Noise In Digital Communication Question 14 English
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