一种高电源抑制比的曲率补偿带隙基准电压源  

A Curvature Compensation Bandgap Reference Voltage Source with High Power Supply Rejection Ratio

作　　者：陈昊 张彩珍[1] 王梓淇 王永功 Chen Hao;Zhang Caizhen;Wang Ziqi;Wang Yonggong(School of Electronics and Information Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China;Tianshui Tianguang Semiconductor Co.,Ltd.,Tianshui 741000,China)

机构地区：[1]兰州交通大学电子与信息工程学院,兰州730070 [2]天水天光半导体有限公司,甘肃天水741000

出　　处：《半导体技术》2019年第12期905-909,共5页Semiconductor Technology

基　　金：国家自然科学基金资助项目(61762057);甘肃省自然科学基金资助项目(1610RJZA046)

摘　　要：基于0.13μm CMOS工艺设计了一个高阶曲率补偿带隙基准电压源,该带隙基准电压源具有低温度系数和高电源抑制比(PSRR)。通过高阶曲率补偿电路得到低温度系数;在该带隙基准电压源的核心电路中,使电流镜管的栅源电压保持恒定值来实现在一定频段下的PSRR增强。利用Cadence工具进行了仿真,并进行了流片验证,测试结果表明,该带隙基准电压源具有恒定的1.2 V基准电压,在-45~165℃内,基准电压的温度系数为3.95×10-6/℃;PSRR在10 kHz下为74.7 dB,在1 MHz下为42 dB;电路启动时间为1.4μs。该设计已应用于高精度嵌入式电源管理芯片的低压差线性稳压器中。A high-order curvature compensation bandgap reference voltage source was designed based on 0.13μm CMOS process with a low temperature coefficient and high power supply rejection ratio(PSRR).The low temperature coefficient was obtained by a high-order curvature compensation circuit.In the core circuit of the bandgap reference voltage source a constant gate-source voltage in the current mirror was maintained to enhance the PSRR under a certain frequency.The Cadence tool was used for the simulation,and the chip was fabricated and verified.The test results show that the bandgap reference voltage source has a constant reference voltage of 1.2 V and temperature coefficient of the reference voltage is 3.95×10-6/℃in the temperature range of-45-165℃.The circuit performs a PSRR of 74.7 dB@10 kHz and 42 dB@1 MHz,and the start-up time of the circuit is 1.4μs.The design has been used in low dropout regulators in high precision implanted power management chips.

关 键 词：带隙基准电压源 高电源抑制比(PSRR) 低温度系数 曲率补偿 启动时间 

分 类 号：TN432[电子电信—微电子学与固体电子学]