A new curvature-corrected CMOS bandgap voltage reference

Abstract

The current paper presents an improved bandgap voltage reference (BGR) that utilizes curvature-corrected current generators which compensate for the voltage reference at lower and higher temperature range. The voltage reference is operated with a supply voltage of 2.5V to achieve an output reference of 1.1835 V. The temperature coefficient achieved from the circuit is 1.342 ppm/°C, resulting from temperature changes between 50°C to 125°C, sixfold improvement from first-order BGR. The proposed circuit is simulated using Silterra 0.13 μm CMOS technology. © IEICE 2012.