Voltage reference architectures for low-supply-voltage low-power applications

Abstract

This paper presents a voltage reference generator architecture and two different realizations of it that have been fabricated within a standard 0.18µm CMOS technology. The architecture takes the advantage of utilizing a sampled-data amplifier (SDA) to optimize the power consumption. The circuits achieve output voltages on the order of 190mV with temperature coefficients of 43ppm/?C and 52.5ppm/?C over the temperature range of 0 to 120?C without any trimming with a 0.8V single supply. The power consumptions of the circuits are less then 500nW while occupying an area of 0.2mm2 and 0.08mm2, respectively.