一种低压低温漂的CMOS带隙基准源

A Curvature-Corrected CMOS Bandgap Reference

基于标准0.35umCMOS工艺,采用一级温度补偿电压作为温度曲率校正电压,与传统采用PTAT电压作为温度曲率校正电压相比,获得了一个电路结构简单,性能更好的带隙基准源。使用Hspice进行仿真,仿真结果表明电路可以在-20-100℃范围内,平均温度系数约2ppm/℃,工作电压为1V左右,获得了一个高性能的带隙基准电压源。该带隙基准源可应用于高精度模数转换器(ADC)、数模转换器(DAC)和系统集成芯片(SOC)中。

The design of curvature correction temperature compensation bandgap reference circuit use the first order temperature compensation bandgap reference voltage as a curvature voltage.and get a better circuit than usually use a PTAP voltage as a curvature voltage,which is fabricated with 0.35um CMOS technology, The bandgap reference has a average temperature coefficient of 2ppm/℃, and a power supply rejection ratio of -90dB.