1. Combinational circuits

3. Lab 07
HALF ADDER .
FULL ADDER

4. ADDER
In electronics, an adder or summer is a digital circuit that performs addition of numbers. In many computers and other kinds of processors, adders are used not only in the arithmetic logic unit(s), but also in other parts of the processor, where they are used to calculate addresses, table indices, and similar operations.

5. Half Adder The half adder adds two single binary digits A and B
 It has two outputs, sum (S) and carry (C).
The higher significant bit of this result is called a carry ( C)

6. Half Adder
C= MSB
S= LSB
Expression
S= A’B+ AB’
C= AB A B c s 1

7. Full Adder C in = carry from last AdditionB
C in
C out s 1
C in = carry from last Addition
Cout = Carry for final stage
S= Sum final stage
Expression

8. Implement a Full adder using half adders.
Task no 2
Implement a Full adder using half adders.

9. Design a circuit that can add two, 4 bit numbers.
Task 03
Design a circuit that can add two, 4 bit numbers.

11. TASK 4
Show how two 7483A could be cascaded to add two 8 bit numbers.