Digital Electronics - ECE Questions and Answers

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL

The logic circuit of the given figure realizes the function

(A + B + C)(D)(E)

(A + B + C) (D)(E)

(A + B = C) (D)(E)

(A + B + C)(D)(E)

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL

Is Schottky TTL, Schottky diode is used primary to

prevent saturation of the transistor

saturate the transistor

act as a switch

act as a controlling switch

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL

What is the maximum output voltage from the 741 op-amp?

Zero

Approximately 1 V

Approximately 3 V

Approximately 5 V

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL

A full adder is to be implemented using half adders and OR gates. A 4 bit parallel adder without any initial carry requires

8 half adders and 4 OR gates

8 half adders and 3 OR gates

7 half adders and 3 OR gates

7 half adders and 4 OR gates

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL

The main advantage of hexadecimal numbers is

ease of conversion from hexadecimal to binary and vice-versa

ease of conversion from hexadecimal to decimal and vice-versa

ease of conversion from gray code to binary and vice-versa

the use of numbers and alphabets

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL

T- FF used as a

transfer Data switch

toggle switch

time delay switch

none

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL

A pulse train can be delayed by a finite number of clock periods by using

serial in-serial out shift register

parallel in serial out shift register

serial in-parallel out shift register

parallel in parallel out shift register

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL

The disadvantage of counter type ADC as compared to comparator ADC is that

resolution is low

conversion time is more

circuit is more complex

stability is low

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL

In 8421 Binary coded Decimal system the decimal number 237 is represented by

1000110111

1000111110

001000110111

10010010011