带有曲率补偿的高精度带隙基准电压源设计  

Design of a High Precision Bandgap Voltage Reference with the Curvature Compensation

作　　者：王永顺[1] 井冰洁 

机构地区：[1]兰州交通大学电子与信息工程学院,兰州730070

出　　处：《半导体技术》2014年第1期14-18,共5页Semiconductor Technology

基　　金：国家自然科学基金资助项目(61366006)

摘　　要：设计了一种带有曲率补偿的高精度带隙基准电压源电路，通过在特定支路上产生二阶正温度系数的电流补偿‰．的二阶负温度系数项来实现曲率补偿，从而得到更低温度系数的基准电压。同时设计了一种高效的启动电路，在电路上电时保证电路正常启动，电路正常工作后启动电路停止工作。该设计基于CSMC0．5μmCMOS工艺，在3．3V电源电压下，输出基准电压800mV，采用Cadence公司Spectre软件进行仿真和实验测试，结果表明，温度为-50～150℃．基准电压的温度系数为2．4×10^-6／℃，电源电压为2．5～4．5V，电压调整率为0．08％／V。该基准电压源已成功应用在DC／DC转换器中，并取得了良好的应用效果。A new kind of bandgap voltage reference circuit with high precision curvature compensa- tion was designed and fabricated. The curvature compensation was implemented by generating a branch current with the positive temperature coefficient to compensate the negative temperature coefficient of non- linear terms of VRE. In this way, a reference voltage with much lower temperature coefficient was ob- tained. A startup circuit was designed, which can start the circuit effectively when the power is on. The startup circuit can be turned off after the normal operation of the bandgap reference （BGR）. The chip was simulated by using Cadence＇s Spectre software and implemented by using CSMC 0.5μm CMOS process. The simulation results indicate that the bandgap voltage reference has a temperature coefficient of 2.41×10^-6/℃ between -50 ℃ and 150 ℃ , and the line regulation is better than 0.08%/V from 2. 5 V to 4.5 V supply voltage. Now the voltage reference has been successfully applied in the DC/DC converters with excellent performance.

关 键 词：带隙基准电压源 曲率补偿 低温度系数 启动电路 互补型金属氧化物半导体 (CMOS) 

分 类 号：TN432[电子电信—微电子学与固体电子学]