Design of Low Power and High Speed Decoder and Priority Encoder using Carbon Nanotube Field Effect Transistor for Binary Content Addressable Memory Array

Abstract

In this paper, design of Positive Feedback Adiabatic Logic (PFAL) based decoder and priority encoder using Carbon Nanotube Field Effect Transistor (CNTFET) for Binary Content Addressable Memory (BCAM) array is presented. The optimum set of CNTFET parameters such as number of tubes, chirality vector, pitch, dielectric constant and dielectric materials for low power and high speed encoder and decoder is used. The performance of proposed decoder and priority encoder is analyzed for average power, peak power and delay. Simulation results show that the proposed circuits outperforms compared to that of CMOS technology based circuits. The average power and peak power of the proposed decoder and priority encoder are in the range of μW while the range of values for CMOS based decoder are mW. The average delay of the proposed decoder is improved by 35.96% compared to that of CMOS based decoder. The average delay of the proposed priority encoder is improved by 30.77% compared to that of CMOS based priority encoder. All simulations are conducted for both CMOS and CNTFET based decoder and Priority encoder in HSPICE at 32 nm technology.