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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 2 of 3.
Denika said:   9 years ago
I am not getting this, Please, anyone can explain this question clearly?
Lavanya said:   8 years ago
Which is the correct answer and how? Please explain it clearly.
Kanika Sharma said:   7 years ago
Please, clearly explain about positive and negative logic.
(1)
Pranab said:   8 years ago
It is -ve logic OR gate and it is also +ve logic AND gate.
Pava kumar said:   1 decade ago
It is negative logic and gate the above answer is wrong.
Kanika Sharma said:   7 years ago
If diodes are in series then what is the answer?
(1)
Gaurav pandey said:   9 years ago
Negative logic AND gate is the right answer.
Chand said:   8 years ago
Positive logic AND, Negative logic OR both.
Priyadarshini said:   7 years ago
How OR gate? anyone explain me clearly.
(1)
Mohd Salim said:   8 years ago
It should be a Negative logic AND gate.
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