GATE (Graduate Aptitude Test in Engineering) Electronics & CE (EC): Questions 609 - 612 of 1602
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Question 609
Appeared in Year: 2014
Question MCQ▾
What is the correct sequence of the following step in the fabrication of a monolithic, bipolar junction transistor? (June)
1. Emitter diffusion
2. Base diffusion
3. Buried layer formation
4. Epi-layer formation
Select the correct sequence using the codes given below:
Choices
Choice (4) | Response | |
---|---|---|
a. | 4,3, 2,1 | |
b. | 3,4, 1,2 | |
c. | 4,3, 1,2 | |
d. | 3,4, 2,1 |
Question 610
Appeared in Year: 2013
Question Assertion-Reason▾
Assertion(Ꭺ)
ABCD parameters are transmission parameters. (September)
Reason(Ꭱ)
The relationship between input and output is given by:
Choices
Choice (4) | Response | |
---|---|---|
a. | Ꭺ is true but Ꭱ is false | |
b. | Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ | |
c. | Ꭺ is false but Ꭱ is true | |
d. | Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ |
Question 611
Appeared in Year: 2014
Question MCQ▾
Priority of the interrupts in the order from the highest to least priority (June)
1. RST 7.5
2. RST 5.5
3.
4. RST 6.5
The correct sequence is
Choices
Choice (4) | Response | |
---|---|---|
a. | 1,4, 2 and 3 | |
b. | 3,2, 4 and 1 | |
c. | 2,4, 1 and 3 | |
d. | 3,1, 4 and 2 |
Passage
Comprehension:
Read the passage and answer the following five questions:
P-i-n photodiode contains a layer of intrinsic semi-conductor material sandwiched between p-and-n regions. The depletion layer is wholly contained within the i region. Thickness of the intrinsic region can be adjusted to produce device with optimum sensitivity and frequency response. P-i-n photodiode is most common type of depletion layer photodiode.
The other classes of photodiodes, avalanche photodiodes, are reverse-biased p-n junction diodes that are operated at voltages above the breakdown voltage. Current multiplication of electron-hole pairs generated by the incident electromagnetic radiation occurs due to avalanche process. The photo multiplication factor is defined as ratio of the multiplied photocurrent to the photocurrent at voltage below breakdown where no avalanche multiplication takes place.
Question 612 (1 of 4 Based on Passage)
Appeared in Year: 2013
Question MCQ▾
Semiconductors are sensitive to (September)
Choices
Choice (4) | Response | |
---|---|---|
a. | Magnetic field | |
b. | Heat | |
c. | Light energy | |
d. | None of the above |