**Abstract**

Recently in the generic systems the load on the processor is much heavy. The ability and the challenging process have ended with larger core operations are in the core processor. This paper is basically given special importance on different methodologies having been proposed for Adder, which is the basic operation of the Arithmetic unit. The wide research on the digital adders has been covered so many applications like designs of ALU, RISC, CISC processors, DSP used for data path arithmetic, low power CMOS, optical computing, Nanotechnology and so on. This paper gives greater knowledge and understanding about the various techniques that have amply used of Adder from the earlier years. In this paper we analyzed the implementation of different types of full Adders implemented using CMOS logic (Static CMOS and Dynamic CMOS), CMOS Transmission Gates, Pass Transistor Gates (CPL and DPL).

**Reference**

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