一种二阶曲率补偿的低温漂高精度带隙基准设计  

Design of a second-order curvature-compensated band-gap reference with low temperature-drift and high precision

作　　者：李宏杰[1] 冯全源[1] 

机构地区：[1]西南交通大学微电子研究所,四川成都610031

出　　处：《电子元件与材料》2014年第12期65-69,共5页Electronic Components And Materials

基　　金：国家自然科学基金资助项目(No.61271090);国家"863"计划重大资助项目(No.2012AA012305)

摘　　要：设计了一种带有二阶曲率补偿的低温漂高精度带隙基准电压源电路,通过采用分段线性补偿原理,分别在低温和高温阶段引入与一阶基准输出电压的温度系数呈相反趋势的线性补偿电流,通过电阻叠加到一阶基准输出电压上,从而大大提高了基准电压随温度漂移的稳定性。基于UMC 0.25μm BCD工艺库进行电路设计,HSPICE仿真结果表明,在–40^+125℃内,基准电压源的温度系数为2.2×10–6/℃,电源电压为2.5~5.0 V时基准输出电压波动仅为0.451 m V,在低频时电源抑制比PSRR为–71 d B。较好地满足了低温漂、高精度、高稳定性的带隙基准电压源设计要求。A second-order curvature-compensated band-gap reference with low temperature-drift and high precision was presented. Based on piecewise-linear compensation techniques, Introducing a current which was opposited to the temperature coefficients of first-order reference output voltage at low and high temperature sections, producted a compensation voltage by putting this current affecting the resistance, the temperature coefficient was obviously reduced.This band-gap reference circuit was designed based on UMC 0.25 μm BCD process. The simulation result by HSPICE shows that the temperature coefficient of this band-gap reference is 2.2×10^-6/℃ in –40-＋125 ℃, and the reference output voltage range is 0.451 m V when power voltage changes from 2.5 V to 5.0 V, The PSRR is –71 d B at low frequency, that satisfies the require of low temperature-drift, high precision and high stability in band-gap designing.

关 键 词：带隙基准 分段线性补偿 温度系数 电源抑制比 线性调整率 高稳定性 

分 类 号：TN432[电子电信—微电子学与固体电子学]