Digital Electronics - Logic Gates - Discussion
Discussion Forum : Logic Gates - General Questions (Q.No. 2)
2.
If a 3-input NOR gate has eight input possibilities, how many of those possibilities will result in a HIGH output?
Discussion:
38 comments Page 3 of 4.
Janci said:
1 decade ago
Yes @Nandi 4078b is the single 8 inputs norgate in CMOS technology.
Hhki said:
10 years ago
NOR gate consider the outputs to be high if the inversion of it is high.
Megu said:
9 years ago
Above all are false.
Sangeetha said:
9 years ago
If all input is 1 then it is high, if all inputs are zero then it is low.
Punju said:
9 years ago
By the truth table at 0 0 input output is 1 and remaining all are 0. Therefore the high output is the 1.
Therefore, the ans is option : A.
Therefore, the ans is option : A.
Pooooja said:
9 years ago
Yeah, right thanks @Punju.
HARIOM SHARMA said:
9 years ago
i/p- 000 then o/p- 111 (high).
ANOOP K SIVAN said:
9 years ago
Just add all three inputs and NOT it for the actual o/p.
JAMES said:
8 years ago
I have a question.
Prove this for me AB+(barB)C+AB = AB+(barB)C.
Prove this for me AB+(barB)C+AB = AB+(barB)C.
(1)
Ashutosh Jaiswal said:
8 years ago
Actually the truth table for NOR Gate is given by
A B Y
0 0 1
0 1 0
1 0 0
1 1 0
And similarly truth table for 3input nor gate is;
A B C Y
0 0 0 1
0 0 1 0
0 1 0 0
0 1 1 0
1 0 0 0
1 0 1 0
1 1 0 0
1 1 1 0
So, only one output is high. Hence option A is the correct option to be elected which was given in the choices.
A B Y
0 0 1
0 1 0
1 0 0
1 1 0
And similarly truth table for 3input nor gate is;
A B C Y
0 0 0 1
0 0 1 0
0 1 0 0
0 1 1 0
1 0 0 0
1 0 1 0
1 1 0 0
1 1 1 0
So, only one output is high. Hence option A is the correct option to be elected which was given in the choices.
(7)
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