Indian Institute of Technology Kharagpur (IIT-K) 2006 M.E Electronics and Telecommunications Gate ece - Question Paper

microprocessor. To choose the I/O device in the I/O address range D4 H — D7 H, its chip-select
(Cs) should be connected to the output of the decoder shown in
figure (a) below:
I/O
Peripheral
(B) output 5
(C) output 2
(D) output 0
35. A 4-bit D/A converter is connected to a free-running 3-bit UP counter, as shown in the
subsequent figure. Which of the subsequent waveforms will be observed at V3?
the flip-flops are in clear state. After applying 2 clock pulses, the outputs of the full-adder
should be
Clock
(A) S=0 C0
(B) S=0 C0
(C) S=1 C0
(D) S=1 C0
36. 2 D-flip-flops, as shown below, are to be connected as a synchronous counter
that goes through the subsequent Q1Q0 sequence
00 — 01 — 11 — 10 — 00 —
The inputs D0 and D1 respectively should be connected as
(A) Q1 and Q0
(B) Q0 and Q1
(C) Q1Q0 and Q1Q0
(D) and Q1Q0
37. subsequent is the segment of a 8085 assembly language program:
LXI SP, EFFF H
CALL 3000 H
3000 H : LXI H, 3CF4 H
PUSH PSW
SPHL
POP PSW
RET
On completion of RET execution, the contents of SP is:
(A) 3CFO H
(B) 3CF8 H
(C) 3FFD H
(D) EFFF H
38. The point P in the subsequent figure is stuck-at-i. The output f will be
(A) ABC
(B) A
(C) ABC
(D) A
39. A signal m(t)with bandwidth 500 Hz is 1st multiplied by a signal g(t)where g(t) = (_i)’<
5(t_O.5xiO 4k)
The resulting signal is then passed through an ideal lowpass filter with bandwidth
i kHz. The output of the lowpass filter would be:
(A) 5(t)
(B) m(t)
(C) 0
(D) m(t)(t)
40. The minimum sampling frequency (in samples/sec) needed to reconstruct the subsequent
signal from its samples without distortion.
(sin2,r1OOOt3 (sin2,r1OOOt2
x(t)=5i I i would be:
Tt }
(A) 2x103
(B) 4x103
(C) 6x103
(D) 8x103
41. A uniformly distributed random variable X with probability density function
f (x) =±(u(x+5)-u(x-5))
Where u(.)is the unit step function is passed through a transformation provided in the figure
below. The probability density function of the transformed random variable Y would be

Earning:   Approval pending.