Digital Electronics - Logic Gates - Discussion
Discussion Forum : Logic Gates - General Questions (Q.No. 37)
37.
A 2-input NOR gate is equivalent to a ________.
Discussion:
20 comments Page 1 of 2.
Komal said:
1 decade ago
A Negative-AND gate functions same as AND gate with all its inputs inverted
A B -A -B OR(A+B) NOR -AND(-A*-B)
0 0 1 1 0 1 1
0 1 1 0 1 0 0
1 0 0 1 1 0 0
1 1 0 0 1 0 0
From above truth table output of NOR gate and negative AND (Bubbled AND gate) are equal.
A B -A -B OR(A+B) NOR -AND(-A*-B)
0 0 1 1 0 1 1
0 1 1 0 1 0 0
1 0 0 1 1 0 0
1 1 0 0 1 0 0
From above truth table output of NOR gate and negative AND (Bubbled AND gate) are equal.
Rooh said:
1 decade ago
For input seq 00 01 10 11
output of nor is 1 0 0 0
output of and is 0 0 0 1
output of nand is 1 1 1 0
So wich is negegetive AND reffer to here i cant understand.
For me it should be negetive OR... the option A will be the answer then..
If given answer is right then please explain it to me...
output of nor is 1 0 0 0
output of and is 0 0 0 1
output of nand is 1 1 1 0
So wich is negegetive AND reffer to here i cant understand.
For me it should be negetive OR... the option A will be the answer then..
If given answer is right then please explain it to me...
S KUMAR SWAMI said:
1 decade ago
In this problem we can solve like also,
At first we have taken 2 input as 1 & 0. In the nor gate the output is 0.
It is equivalent to negative and gate because in and gate we will got 0 as output. So in negative and gate it must be 1.
Hence 2 input-nor gate is equivalent to negative and gate.
At first we have taken 2 input as 1 & 0. In the nor gate the output is 0.
It is equivalent to negative and gate because in and gate we will got 0 as output. So in negative and gate it must be 1.
Hence 2 input-nor gate is equivalent to negative and gate.
GURUSWAMY said:
1 decade ago
Given inputs are A, B,
Case 1:
For NOR gate output is (A+B)complement.
Case 2 :
For negative and gate output is:
(A complement) * (B complement) = (A+B) complement.
Case 1:
For NOR gate output is (A+B)complement.
Case 2 :
For negative and gate output is:
(A complement) * (B complement) = (A+B) complement.
NITESH JAIN said:
10 years ago
How to Remember?
-1/4AND ===negative==> NOR^-2.
-1/4OR ===negative==> NAND^-2.
-1/4NAND ===negative==> OR^-2.
-1/4NOR ===negative==> AND^-2.
-1/4AND ===negative==> NOR^-2.
-1/4OR ===negative==> NAND^-2.
-1/4NAND ===negative==> OR^-2.
-1/4NOR ===negative==> AND^-2.
JAGADISH said:
1 decade ago
NOR gate is equivalent to AND gate with its inputs bubbled. Means NOR gate = Inputs bubbled AND gate.
Similarly NAND gate means inputs bubbled or gate.
Similarly NAND gate means inputs bubbled or gate.
Viswanath said:
1 decade ago
If inverter is placed for the two terminals of the and gate. Then it is nor gate. Then from this we can say that -ve and gate is equivalent to nor gate.
Ashok said:
1 decade ago
Negative and gate means your inputs are inverted to the and gate. So you get a output for (00 01 10 11) is 1 0 0 0. It same as the nor gate output. Ok.
Khyati said:
1 decade ago
If we compare truth table of negative AND gate And truth table of NOR gate. Than we can easily understand.
AN007 said:
9 years ago
NOR = (A + B) compliment.
-ve AND means bubble at the input,= NAND.
A comp + B comp = A.B comp.
-ve AND means bubble at the input,= NAND.
A comp + B comp = A.B comp.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers