Electronics and Communication Engineering - Digital Electronics - Discussion

25. 

In a 4 input OR gate, the total number of High outputs for the 16 input states are

[A]. 16
[B]. 15
[C]. 14
[D]. 13

Answer: Option B

Explanation:

OR gate gives high output when one or more inputs are high.


Suchit Katre said: (Mar 17, 2018)  
OR gate gives output high only when two input are high or one is high and second one is low.

0 + 0 = 0 Low output
1 + 0 = 1 High output
1 + 1 = 1 High output

That's why out of 16 output only 15 output is high.

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