### Discussion :: Logic Gates - General Questions (Q.No.37)

M.Naresh said: (Aug 25, 2011) | |

Please explain me. |

G.V.Narayanan said: (Sep 19, 2011) | |

Reason for 2 input NOR gate we apply. Why this result for AND gate? |

Rooh said: (Oct 14, 2011) | |

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... |

Bhargavi said: (Mar 8, 2012) | |

Can any one please explain this clearly ? |

Ashok said: (Apr 18, 2012) | |

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. |

Komal said: (Jun 4, 2012) | |

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. |

Arjun Tehale said: (Oct 7, 2012) | |

can any one spell it out properly plz |

Viswanath said: (Dec 29, 2012) | |

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. |

Khyati said: (Oct 25, 2013) | |

If we compare truth table of negative AND gate And truth table of NOR gate. Than we can easily understand. |

Guruswamy said: (Jan 24, 2014) | |

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. |

S Kumar Swami said: (Feb 21, 2014) | |

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. |

Jagadish said: (Jun 16, 2015) | |

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. |

Nitesh Jain said: (Sep 29, 2015) | |

How to Remember? -1/4AND ===negative==> NOR^-2. -1/4OR ===negative==> NAND^-2. -1/4NAND ===negative==> OR^-2. -1/4NOR ===negative==> AND^-2. |

Narottam said: (Jun 1, 2016) | |

Why not option C? |

Shreyan said: (Jul 6, 2016) | |

@Komal. I got it, Thanks. |

An007 said: (Aug 2, 2016) | |

NOR = (A + B) compliment. -ve AND means bubble at the input,= NAND. A comp + B comp = A.B comp. |

Sharath said: (Aug 17, 2016) | |

Nice explanation, Thanks to all. |

Sudhakar said: (Jun 9, 2017) | |

I think Option 'A' is the answer. |

Pavan Chowdary said: (Sep 10, 2017) | |

Yes, correct explanation @Guruswamy. |

#### Post your comments here:

Name *:

Email : (optional)

» Your comments will be displayed only after manual approval.