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A 2-input gate gives high output only when both the inputs are low. For all other conditions the output remains low. Identify the gate. 

A 2-input gate gives high output only when both the inputs are low. For all other conditions the output remains low. Identify the gate.  Correct Answer NOR

Logic Gates:

  • Logic gates are the basic building blocks of any digital system.
  • It is an electronic circuit having one or more than one input and only one output.
  • The relationship between the input and the output is based on a certain logic.
  • Based on this, logic gates are named as AND gate, OR gate, NOT gate etc.


AND Gate:
Logic diagram:
[ alt="F1 Nakshtra 17-01-22 Savita D7" src="//storage.googleapis.com/tb-img/production/22/01/F1_Nakshtra%20_17-01-22_Savita_D7.png" style="user-select: auto; width: 128px; height: 39px;">

Truth Table: 

A B Y=A.B
0 0 0
0 1 0
1 0 0
1 1 1

OR Gate:

 

Logic diagram:[ alt="F1 Nakshtra 17-01-22 Savita D10" src="//storage.googleapis.com/tb-img/production/22/01/F1_Nakshtra%20_17-01-22_Savita_D10.png" style=" user-select: auto; width: 102px; height: 39px;">

Truth Table:

A B Y=A+B
0 0 0
0 1 1
1 0 1
1 1 1
 

 

NOT Gate:
Logic diagram:
[ alt="F1 Nakshtra 17-01-22 Savita D11" src="//storage.googleapis.com/tb-img/production/22/01/F1_Nakshtra%20_17-01-22_Savita_D11.png" style="user-select: auto; width: 102px; height: 39px;">

Truth Table:

A Y=A'
0 1
1 0
 

 

NAND Gate:
Logic diagram:

[ alt="F1 Nakshtra 17-01-22 Savita D12" src="//storage.googleapis.com/tb-img/production/22/01/F1_Nakshtra%20_17-01-22_Savita_D12.png" style="width: 161px; height: 39px;">
[ alt="F1 Nakshtra 17-01-22 Savita D13" src="//storage.googleapis.com/tb-img/production/22/01/F1_Nakshtra%20_17-01-22_Savita_D13.png" style="user-select: auto; width: 109px; height: 39px;">

Truth Table:

A B Y= A.B
0 0 1
0 1 1
1 0 1
1 1 0
 

 

NOR Gate:
Logic diagram:[ alt="F1 Nakshtra 17-01-22 Savita D8" src="//storage.googleapis.com/tb-img/production/22/01/F1_Nakshtra%20_17-01-22_Savita_D8.png" style=" user-select: auto; width: 151px; height: 39px;">[ alt="F1 Nakshtra 17-01-22 Savita D9" src="//storage.googleapis.com/tb-img/production/22/01/F1_Nakshtra%20_17-01-22_Savita_D9.png" style=" width: 102px; height: 39px;">

Truth Table:

A B Y=A+B
0 0 1
0 1 0
1 0 0
1 1 0


XOR Gate:
  • XOR or Ex-OR gate is a special type of gate.
  • It can be used in the half adder, full adder and subtractor.
  • The exclusive-OR gate is abbreviated as EX-OR gate or sometimes as X-OR gate.

Logic Diagram:
[ alt="F1 Nakshtra 17-01-22 Savita D15" src="//storage.googleapis.com/tb-img/production/22/01/F1_Nakshtra%20_17-01-22_Savita_D15.png" style=" user-select: auto; width: 106px; height: 39px;">

Truth Table:
A B Y=A⊕B
0 0 0
0 1 1
1 0 1
1 1 0


XNOR Gate:
  • XNOR gate is a special type of gate.
  • It can be used in the half adder, full adder and subtractor.
  • The exclusive-NOR gate is abbreviated as EX-NOR gate or sometimes as X-NOR gate.

Logic Diagram:
[ alt="F1 Nakshtra 17-01-22 Savita D16" src="//storage.googleapis.com/tb-img/production/22/01/F1_Nakshtra%20_17-01-22_Savita_D16.png" style=" user-select: auto; width: 108px; height: 38px;">

Truth Table:
A B Y=A?B
0 0 1
0 1 0
1 0 0
1 1 1

 

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