Half Adder in Digital Logic

Half Adder ( HA )

The addition of 2 bits is done using a combination circuit called Half adder. The input variables are augend and addend bits and output variables are sum & carry bits. A and B are the two input bits.

halfadder1

Truth Table:

ha_truth



Logical Expression: 
Sum = A XOR B 
Carry = A AND B 

Implementation:

halfadder

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