1.
Moeez Ahmad
1421-316267

2.
Adder
 In an electronic circuit that preforms addition
of numbers. In modern computer adder
resides in Arithmetic logic Unit(ALU).
 Types of Adder:
Half Adder
Full Adder

3.
Half Adder
 The half adder accepts two binary digits on its
inputs and produces two binary digits output,
a sum bit and carry bit.
 Half Adder is formed with one Exclusive OR
gate and one AND gate.

4.
Block Diagram of Half Adder
HALF ADDER
SUM(S)
Carry(C)
A
B

5.
Half Adder Logic Circuit
B
A
SUM(S)
Carry(C)

6.
Half Adder Truth Table
A B SUM Carry
0 0 0 0
0 1 1 0
1 0 1 0
1 1 0 1

7.
Full Adder
 The full adder accepts two input bits and an
input carry and generates a sum output and
an output carry.
 We can implement full adder circuit with the
help of two half adder circuit.

8.
2 INPUT OR GATE:

9.
Block Diagram of Full Adder
FULL ADDER
SUM(S)
Cout
A
B
Cin

10.
Full Adder Logic Circuit
B
A
Cin
SUM(S)
Cout

11.
Full Adder Truth Table
A B Cin SUM Cout
0 0 0 0 0
0 0 1 1 0
0 1 0 1 0
0 1 1 0 1
1 0 0 1 0
1 0 1 0 1
1 1 0 0 1
1 1 1 1 1

12.
What is main difference between Half
and Full adder?
 Main difference is that Full adder receives
three inputs and half adder receives two
inputs.
 Full Adder is formed by combination of two
half Adders.