https://www.youtube.com/watch?v=OuTyKkfxpSM&t=444s

1. CATHOLICATE COLLEGE
PATHANAMTHITTA
Re- accredited by NAAC in A+ grade with CGPA 3.60
CATHOLICATE COLLEGE
PATHANAMTHITTA
Re- accredited by NAAC in A+ grade with CGPA 3.60

2. HALF ADDERHALF ADDER

3. Half adder is a arithmetic circuit that adds two numbers and
produces a sum bit (S) and carry bit (C) as the output
 The half adder can add only two input bits (A and B) and
has nothing to do with the carry if there is any in the
input
 That means the binary addition process is not complete and
that’s why it is called a half adder
HALF ADDERHALF ADDER

5. FULL ADDER
• Full adder is a combinational
circuit that performs the
addition of three bits
• It consists of three inputs and
two outputs Carry 1 1 Decimal
1 1 1 7
1 0 1 5
1 1 0 0 12

6. INPUTS OUTPUTS
C B A CARRY SUM
0 0 0 0 0
0 0 1 0 1
0 1 0 0 1
0 1 1 1 0
1 0 0 0 1
1 0 1 1 0
1 1 0 1 0
1 1 1 1 1
FULL ADDER
2N
N=3
23

9. CARRY 1 1 1
FIRST NUMBER (13) 1 1 0 1
SECOND NUMBER (11) 1 0 1 1
SUM (24) 1 1 0 0 0
FIRST
NUMBER
A3 A2 A1 A0
1 1 0 1
SECOND
NUMBER
B3 B2 B1 B0
1 0 1 1

10. 4 BIT ADDER
10111 0 1 1
0001
111
1
FIRST
NUMBER
A3 A2 A1 A0
1 1 0 1
SECOND
NUMBER
B3 B2 B1 B0
1 0 1 1

11. George Thomas