# 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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