Design of Ultra Low Power, Temperature Independent Resistorless Bandgap Reference Circuit in 0.18 μm CMOS

Abstract

A low power resistor-less voltage reference circuit is proposed in this paper. The proposed circuit has been designed and simulated using a standard 0.18μm CMOS technology, which provides a stable reference voltage at output, independent of variation in power supply and temperature. The circuit provides reference voltage of 1.15V and current of 0.14μA with temperature coefficient of 11ppm/°C and line of regulation of 20%/V in temperature range of -45 to 125 °C while consuming power of 0.25μW at 1.8V of power supply.