Abstract: An Arithmetic logic Unit (ALU) is the heart of all microprocessors. It performs logical or arithmetic operations. The principal limitations in scaling the bulk CMOS are short channel effects, sub-threshold leakage and gate-dielectric leakage. FinFET has an excellent control on short channel effects within the sub-micron regime as a result growing the probability to scale down the transistor. In this paper, an 8-bit ALU that performs basic logical and arithmetic operations has been designed using FinFET structures and leakage power has been studied and compared with MOSFET structure. The simulation is carried out using TANNER EDA tools.

Keywords: FINFET, Leakage Power, Back Biasing, Independent gate circuit.