Implementation of a full adder circuit with new full swing EX-OR/EX-NOR gate

The Ex-OR and Ex-NOR gates are the basic building blocks of various digital system applications like adder, comparator, and parity generator/checker and encryption processor. This paper proposes a full swing pass transistor based Ex-OR/Ex-NOR gate which gives better driving capability, less propagation delay and low power dissipation as compared to the existing Ex-ORlEx-NOR circuits, and by modifying the existed circuits. Full adder is an essential component for the design and development of all type of processors like digital signal processors, microprocessors etc. So, in this paper a full adder is constructed by using the new proposed Ex-OR/Ex-NOR gate. All the existed and proposed circuits have been simulated using Cadence 180nm CMOS technology file at different supply voltages ranging from 0.6 V to 3.3 V. The simulation result demonstrates that the delay, power dissipation and power-delay product (PDP) of the proposed design are better than existed design.