A 1.2-V 2.18-ppm/°C curvature-compensated CMOS bandgap reference

LETTER

Yuxin Zhang, Xiamen Eochip Seiconductor Co., Ltd.">Jinghu Li, Xinsheng Wang, The College of Mechanical and Electronic Engineering, Fujian Agriculture and Forestry University">Zhicong Luo, Yanfei Zhou

Author information

Keywords: bandgap voltage reference, temperature piecewise compensation, digital trimming, and temperature coefficient

JOURNAL FREE ACCESS

2021 Volume 18 Issue 11 Pages 20210162

DOI https://doi.org/10.1587/elex.18.20210162

Browse “Advance online publication” version

Details

Abstract

A high-precision and low-temperature-coefficient bandgap voltage reference is proposed in 0.11 µm CMOS process. A temperature piecewise compensation circuit is added to a traditional bandgap reference to decrease the temperature coefficient (TC). The digital trimming technology has been used to solve the deviation of TC and output voltage resulting from process corner and mismatch. Simulation result shows that the bandgap reference achieves TC of 2.18 ppm/°C from -40°C to 125°C. Bandgap reference output voltage is 1.2 V with in the error of ±5 mV.

Corresponding author

Register with J-STAGE for free!