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1.
Statement for Linked Answer Questions :
A sequence x(n) has non-zero values as shown in figure.
[1] The sequence 
, will be [2 marks]
[2] The Fourier transform of y(2n) will be [2 marks]
(A) e-j2ω [cos4ω + 2cos2ω + 2]
(B) [cos2ω + 2cosω + 2]
(C) e-jω [cos2ω + 2cosω + 2]
(D) ej2ω [cos2ω + 2cosω + 2]asked in Electronics and Communication Engineering, 2005
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2.
Statement for Linked Answer Questions :
Voltage standing wave pattern in a lossless transmission line with characteristic impedance 50Ω and a resistive load is shown in figure.
[1] The value of the load resistance is [2 marks]
(a) 50Ω
(b) 200Ω
(c) 12.5Ω
(d) 0Ω[2] The reflection coefficient is given by [2 marks]
(a) -0.6
(b) -1
(c) 0.6
(d) 0asked in Electronics and Communication Engineering, 2005
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3.
Statement for Linked Answer Questions :
A symmetric three-level midtread quantizer is to be designed assuming equiprobable occurrence of all quantization levels.
[1] If the input probability density function is divided into three regions as shown in figure, the value of a in the figure is 
[2 marks]
(A) 1/3
(B) 2/3
(C) 1/2
(D) 1/4
[2] The quantization noise power for the quantization region between –a and +a in the figure is [2 marks]
(A) 1/9
(B) 4/81
(C) 5/81
(D) 2/81
asked in Electronics and Communication Engineering, 2005
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4.
Statement for Linked Answer Questions :
The open loop transfer function of a unity feedback system is given by
G(s) = 3e-2s/[s(s+2)]
[1] The gain and phase crossover frequencies in rad/sec are, respectively
[2 marks]
(a) 0.632 and 1.26
(b) 0.632 and 0.485
(c) 0.485 and 0.632
(d) 1.26 and 0.632[2] Based on the above results, the gain and phase margins of the system will be [2 marks]
(a) -7.09dB and 87.5°
(b) 7.09dB and 87.5°
(c) 7.09dB and -87.5°
(d) -7.09dB and -87.5°asked in Electronics and Communication Engineering, 2005
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5.
Statement for Linked Answer Questions :
Consider an 8085-microprocessor system.
[1] The following program starts at location 0100H.
LXI SP, 00FF
LXI H, 0701
MVI A, 20H
SUB M
The content of accumulator when the program counter reaches 0109H is
[2 marks]
(a) 20H
(b) 02H
(c) 00H
(d) FFH[2] If in addition following code exists from 0109H onwards.
ORI 40H
ADD M
What will be the result in the accumulator after the last instruction is executed? [2 marks]
(a) 40H
(b) 20H
(c) 60H
(d) 42Hasked in Electronics and Communication Engineering, 2005
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6.
Given rd = 20 kW, IDSS = 10mA,VP = −8V.
[1] Zi and Zo of the circuit are respectively [2 marks]
(a) 2 MΩ and 2 kΩ
(b) 2 MΩ and 20/11 kΩ
(c) Infinity and 2 MΩ
(d) Infinity and 20/11 kΩ[2] ID and IDS under DC conditions are respectively [2 marks]
(a) 5.625 mA and 8.75 V
(b) 7.500 mA and 5.00 V
(c) 4.500 mA and 11.00 V
(d) 6.250 mA and 7.50 V[3] Transconductance in milli-Siemens (mS) and voltage gain of the amplifier are respectively [2 marks]
(a) 1.875 mS and 3.41
(b) 1.875 mS and -3.41
(c) 3.3 mS and –6
(d) 3.3 mS and 6asked in Electronics and Communication Engineering, 2005
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