摘要
基于0.18μm BCD工艺,设计了一种新型的低功耗指数补偿带隙基准。对高温段进行指数补偿,降低温漂;利用预稳压技术,引入负反馈环路以提高基准的电源电压抑制比。经过HSPICE仿真验证,基准输出电压为1.233 V,-15℃~145℃温度范围内的温度系数为3×10-6/℃;低频时电源电压抑制比为-94dB,供电电压在2.8~5V变化时,基准输出电压的线性调整率仅为0.000 5%,当供电电源为2.8V时,整体静态电流仅为3.8μA。
Based on a 0.18μm BCD process,a novel low power bandgap reference with exponential curvature compensation was designed.The temperature drift at high temperature was reduced through exponential curvaturecompensation.The negative feedback loop was introduced to improve the power supply rejection ratio of the reference voltage source by using the pre-regulation technology.Verified by HSPICE simulation,the output voltage of the bandgap reference was 1.233 V.At-15 ℃~145 ℃,the temperature coefficient of the reference voltage was3×10-6/℃,and the power supply rejection ratio at low frequency was-94 dB.When the power supply voltage varied from 2.8Vto 5V,the reference voltage＇s line regulation was just 0.000 5%.The quiescent current of the whole circuit was 3.8μA at a 2.8Vpower supply.
作者
付鑫
冯全源
FU Xin FENG Quanyuan(Institute of Microelectronics , Southwest J iaotong University, Chengdu 611756, P. R. China)
出处
《微电子学》
CAS
CSCD
北大核心
2016年第6期750-753,共4页
Microelectronics
基金
国家自然科学基金资助项目(61531016
61271090)
四川省科技支撑计划项目(2015GZ0103)
关键词
指数补偿
低功耗
电源抑制比
负反馈
Exponential curvature compensation
Low power
PSRR
Negative feedback
