Introduction to High speed adder used in digital signal processing Seminar Topic:

At the very least, most people expect computers to do some kind of arithmetic computation and thus, most people expect computers to add. Combinational logic circuits that perform binary addition are known as adders. We have half adder and full adder. Half adder is a combinational circuit which performs the addition of two bits.

In half adder circuit we have two binary inputs and two binary outputs. Full adder is also a combinational circuit which performs the addition of three bits. Full adder circuit may also be implemented from the combination of two half adder circuits. 

             We have some problems with this adder like it is very slow and some times it may give wrong results because of slow propagation of signals. To overcome these problems we have several adders, those are: Ripple adder, Carry Look Ahead adder, Carry Select adder, 2’s compliment adder, Conditional Sum adder, Carry Save adder.

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