华中科技大学学报（自然科学版）2013，Vol.41Issue(8)：20-23,4.
高阶分段非线性曲率校正带隙基准源
High-order piecewise nonlinear curvature correcting bandgap reference
摘要
Abstract
By adding two current branches to a conventional first-order BGR (bandgap reference),a BGR for high-order piecewise nonlinear curvature correction was formed.In the lower temperature range (TR),the curvature correction circuit will subtract the current from the output branch of the first-order BGR to decrease its positive temperature dependence.While in the higher temperature range,the circuit will inject current to the output branch of the first-order BGR to compensate its negative temperature dependence.The proposed BGR was designed in Global Foundry 0.35 μm mixedsignal CMOS process with chip area of 0.14 mm2 and current of 47 μA.Simulation result shows the proposed BGR achieves four extrema in the TR of-40～125 ℃,which means the simulated temperature coefficient (TC) is only 0.7 × 10-6 ℃-1.Measurement result shows the TC,line regulation in the supply range of 2～4 V and low frequency PSR (power supply rejection) are 7.8 × 10-6℃-1,0.8mV · V-1,and-69.5 dB,respectively.关键词
带隙基准源/分段非线性/曲率校正/温度系数/线性调整率/电源抑制Key words
bandgap reference/ nonlinear piecewise/ curvature corrected/ temperature coefficient / line regulation/ power supply rejection分类
信息技术与安全科学引用本文复制引用
李景虎,张兴宝,周斌,沙学军..高阶分段非线性曲率校正带隙基准源[J].华中科技大学学报（自然科学版）,2013,41(8):20-23,4.基金项目
国家自然科学基金资助项目(61100031) （61100031）
中央高校基本科研业务费专项资金资助项目(HIT.NSRIF.2013139). （HIT.NSRIF.2013139）
