1. Universal college of engineering & technology

2. .By Harsh Patel) 130460111012

3. What is Adder?

4. Adder : In electronics an adder is digital circuit that perform addition of numbers. In modern computer adder reside in the arithmetic logic unit (ALU).

5. Adders : Adders are important not only in the computer but also in many types of digital systems in which the numeric data are processed. Types of adder: 1. Half adder 2. Full adder

6. Half adder : The half adder accepts two binary digits on its inputs and produce two binary digits outputs, a sum bit and a carry bit.

7. Full adder : The full adder accepts two inputs bits and an input carry and generates a sum output and an output carry.

8. Truth Table of Adder ABC in C out ∑ 00000 00101 01001 01110 10001 10110 11010 11111

9. A B C in ∑ C out C out = (A B). C in + A.B Circuit of Adder

10. 4-Bit Adder  A single full –adder is capable of adding two 1-bit numbers and input carry.  What happens if we want to add binary numbers with more than 1-bit?  The concept of additional full-adders must be used i.e. to add 2-bit numbers two adders must be needed and to add 4-bit numbers four adders must be needed.

11. 4-Bit Adder

12. Thanks!