Electronics and Communication Engineering - Digital Electronics - Discussion

Discussion Forum : Digital Electronics - Section 1 (Q.No. 13)

Digital Electronics

13.

The circuit in the given figure is

positive logic XOR gate

negative logic OR gate

negative logic AND gate

positive logic AND gate

Answer: Option

Explanation:

Since V(I) is lower state than V(0) it is a negative logic circuit. Since diodes are in reversed parallel, it is an AND gate.

Note: In Boolean algebra it is recognized that a positive logic OR is a negative logic AND. Similarly a positive logic AND is a negative logic OR.

Discussion:

29 comments Page 3 of 3.

Shiva said: 5 years ago

Not getting, Please Explain briefly.

(2)

Arnab said: 8 years ago

It is only positive logic AND gate.

Shruti said: 9 years ago

Yes, it is negative logic AND gate.

Ramya said: 7 years ago

This is negative logic or gate.

Sai said: 8 years ago

How we find AND OR using diodes?

Sumit Dath said: 9 years ago

It is negative logic AND gate.

Pullas said: 1 decade ago

It is negative and gate.

Gyandeep shukla said: 9 years ago

It is positive OR gate.

Irshad said: 9 years ago

@Pava Kumar.

How -ve?

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