International Research Journal of Education and Technology

Adders are the components which are used to add two or more bits. They are mainly used in the circuits of arithmetic logic units. There are many types of adders which help have an equal range of advantages and disadvantages were among all Carry select adders contain very simple logic and less time consumption. And so here arises an idea of developing a hybrid adder using the advantages of Carry select adder, Kogge stone adder and Carry look ahead adder to speed up the arithmetic and logic operations. Carry look ahead adder is the fastest adder which reduces the delay of carry propagation. Kogge stone adder is a nonconventional adder which has the best advantage over speed computations. The idea of implementing the Hybrid Carry select adder using these two adders gives a better performance over speed, energy and power consumptions. When such a type of adder is being designed, arithmetic and logic operations can be done at a very high speed compared to other various types of adders.

Index Terms

Carry look ahead adder, Kogge stone adder, Hybrid carry select adder, Fast computations in logics, Conventional adder types.