Digital Circuits [GATE (Graduate Aptitude Test in Engineering) Electronics]: Questions 142 - 144 of 271

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Question 142

Digital Circuits
Boolean Algebra, Minimization of Functions

Appeared in Year: 2018 (UGC-NET)

Question

MCQ▾

Consider the following logic families:

1) Standard TTL logic family

2) ECL- logic family

3) RTL- logic family

4) CMOS- logic family

Arrange the above logic families in order of their decreasing power dissipation: (July)

Choices

Choice (4)Response

a.

3) , 2) , 4) and 1)

b.

2) , 3) , 4) and 1)

c.

2) , 3) , 1) and 4)

d.

3) , 2) , 1) and 4)

Question 143

Digital Circuits
Boolean Algebra, Minimization of Functions

Appeared in Year: 2018 (UGC-NET)

Question

Assertion-Reason▾

Assertion(Ꭺ)

Emitter-Coupled logic (ECL) is the fastest of all logic families and used in application where very high speed is essential. (July)

Reason(Ꭱ)

High speed ECL is because the transistors are used in difference amplifier configuration in which they are never driven into saturation and the storage time is eliminated.

Choices

Choice (4)Response

a.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

b.

Both Ꭺ and Ꭱ are false

c.

Ꭺ is false but Ꭱ is true

d.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

Question 144

Digital Circuits
Boolean Algebra, Minimization of Functions

Appeared in Year: 2018 (UGC-NET)

Question

Assertion-Reason▾

Assertion(Ꭺ)

The hexadecimal numbers are first converted into binary numbers and operations are performed using binary representation of hexadecimal numbers using rules of binary numbers. (July)

Reason(Ꭱ)

The information can be handled in hexadecimal form in digital circuits but it is easier to enter information using binary numbers.

Choices

Choice (4)Response

a.

Ꭺ is false but Ꭱ is true

b.

Ꭺ is true but Ꭱ is false

c.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

d.

Both Ꭺ and Ꭱ are false

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