Explain design of adder, Computer Engineering

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Q. Explain Design of adder?

Adders play one of the most significant roles in binary arithmetic. As a matter of fact fixed point addition is frequently used as a simple measure to implement processor's speed. Subtraction and addition circuit can be used as foundation for implementation of division and multiplication.

So considerable efforts have been put in designing of high speed subtraction and addition circuits. It's considered to be a significant task since the time of Babbage. Number codes are also liable for adding to complexity of arithmetic circuit. The 2's complement notation is one of the most used codes for fixed-point binary numbers due to ease of performing substraction and addition by it.

A combinational circuit which performs addition of two bits is known as a half adder where as combinational circuit that performs arithmetic addition of 3 bits (third bit is previous carry bit) is known as a full adder.


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