A novel current reference in 45nm cmos technology

In this paper a novel CMOS temperature and supply voltage independent current reference has been proposed. This design is based on subtraction of two scaled version PTAT (proportional to temperature) currents to get temperature independent current reference. Implemented in 45nm CMOS technology and simulated with Spectre. Simulation results shows that the proposed current reference achieves temperature coefficient of 22ppm/°C against temperature variation of -4O°C-120°C and line sensitivity of 337ppm/V against supply variation of 0.6-1.8V, while consuming 135uW from 1.8V supply and occupying 5184um2.