Implementation of full adder cells using NP-CMOS and Multi-Output logic styles in 90nm technology

In this paper we present two novel 1-bit full adder cells in dynamic logic style. NP-CMOS (Zipper) and Multi-Output structures are used to design the adder blocks. Characteristic of dynamic logic leads to higher speeds than the other standard static full adder cells. Using Tanner and 90nm CMOS technology exhibits a significant decrease in the cell delay which can result in a considerable reduction in the power-delay product (PDP). The PDP of Multi-Output design at 1.8v power supply is around 0.15 fem to joule that is 5% lower than conventional dynamic full adder cell and at least 21% lower than other static full adders.