GATE (Graduate Aptitude Test in Engineering) Electronics: Questions 512 - 516 of 1076

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Question 512

Sample and Hold Circuits, ADCs and DACs

Appeared in Year: 2013 (UGC-NET)

Question

MCQ▾

Consider the Analogue and Digital converters given below:

1. Successive Approximation ADC

2. Dual Ramp ADC

3. Counter Method ADC

4. Simultaneous ADC

The correct sequence of the ascending order in terms of conversion times of these ADC՚s is

Choices

Choice (4)Response

a.

2,3, 4,1

b.

3,2, 1,4

c.

4,1, 3,2

d.

3,2, 4,1

Question 513

Boolean Algebra, Minimization of Functions

Appeared in Year: 2013 (UGC-NET)

Question

MCQ▾

Which of the following logic family is fastest of all?

Choices

Choice (4)Response

a.

TTL

b.

ECL

c.

RTL

d.

DCTL

Question 514

Appeared in Year: 2013 (UGC-NET)

Question

Match List-Ⅰ List-Ⅱ▾

Match the following List -i with List-ii

List-Ⅰ (Column-I)List-Ⅱ (Column-II)
(A)

LED

(i)

Rectifier diode

(B)

Tunnel diode

(ii)

Oscillator

(C)

PIN Diode

(iii)

Light emitter

(D)

PN Diode

(iv)

Light detector

Choices

Choice (4)Response
  • (A)
  • (B)
  • (C)
  • (D)

a.

  • (i)
  • (iv)
  • (ii)
  • (iii)

b.

  • (i)
  • (ii)
  • (iii)
  • (iv)

c.

  • (iii)
  • (ii)
  • (iv)
  • (i)

d.

  • (ii)
  • (iii)
  • (iv)
  • (i)

Question 515

Appeared in Year: 2013 (UGC-NET)

Question

MCQ▾

The interrupts in 8085 processor are

1. RST 7.5

2. RST 6.5

3. RST 5.5

4. TRAP

Keep the sequence from least priority to highest priority

Choices

Choice (4)Response

a.

1,2, 3,4

b.

4,3, 2,1

c.

1,4, 3,2

d.

3,2, 1,4

Passage

Multiplexing is the sending of separate signals together, over the same cable or bearer simultaneously without interference. Time division multiplex is a method of interleaving in the time domain pulses belonging to different transmissions. These pulses are generally narrow and separation between successive pulses is rather wide. That being the case it is possible, provided the two ends of a link are synchronized, to use the wide spaces for pulses belonging to other transmissions. Frequency division multiplexing concerns itself with combining continuous signals. It may be thought of as an outgrowth of independent side band transmission on a much enlarged scale. As will see 12 or 16 channels are combined into a group, 5 groups into a subgroup. Each group and subgroup is then sent as a whole unit one microwave link cable or other broadband system. Continental broadband systems are then treated followed by coaxial cables, fibre optic cable, microwave links and trope scatter systems.

Question 516 (1 of 5 Based on Passage)

Criterion for Oscillation, Single-Transistor and Opamp Configurations

Appeared in Year: 2013 (UGC-NET)

Question

MCQ▾

Microwave link repeaters are typically 50 km apart

Choices

Choice (4)Response

a.

Because of earths curvature

b.

Because of output tube power limitations

c.

To ensure that the applied dc voltage is not excessive

d.

Because of atmospheric attenuation

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