Thursday, July 21, 2011

Universal Gate NAND




Summery
In digital logic design we have familiar with various gate. Among these gates some are known as Universal Gate, some are well known as Basic Gates. In this topic we will try to discuss about the verification of Universal Gates, implementation of different logic gates with NAND gate. At last we will try to verify the truth table of different logic gates with NAND implementation.

Apparatus

Sl No
Name of the apparatus
 Rating
 Quantity
 1
 Dc Power Supply
 +5V dc
    1
 2
 IC(Quad-2 Input NAND Gate) HD74LS00P
 Vcc=5v,Vin=50
    2
 3
 Light Emitting Diode
 (1.5-3)v,(20-50)ma
    1
 4

Bread Board

    1
  5
Connecting Wire

   As required
         

Implementation with NAND Gate
Truth Table                                                   Circuit Diagram
Inverter Gate  

                                                                                                       
 Input
 Output
  1
   0
  0
   1

AND Gate


Input  X
Input Y
Output Q
  0
  0
   0
  0
  1
  0
   1
   0
  0
  1
  1
  1


 



 

OR Gate 

Input  X
Input Y
Output Q
  0
  0
   0
  0
  1
  1
   1
   0
  1
  1
  1
  1
 

                             





NOR Gate


 

Input  X
Input Y
Output Q
  0
  0
   0
  0
  1
  0
   1
   0
  0
  1
  1
  1








Exclusive-OR Gate



 
Input   A
Input B
Output  F
    0
  0
   0
    0
  1
   1
    1
  0
   1
    1
  1
   0







 
1  Exclusive-NOR Gate

 
Input   A
Input B
Output  F
    0
  0
   1
    0
  1
   0
    1
  0
   0
    1
  1
   1

                                  
      








This is why NAND Gate is called Universal Gate. And this is how different types of Basic Gates can be implemented by the NAND Gate. These experiments can also be performed in the Laboratory easily using   74LS00 IC.







 

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