一种高电源抑制比快速启动的带隙基准的设计  

Design of a fast start-up bandgap voltage reference with high PSRR

作　　者：吴宏元 张章 程威 马永波 WU Hongyuan;ZHANG Zhang;CHENG Wei;MA Yongbo(School of Microelectronics,Hefei University of Technology,Hefei 230601,China)

机构地区：[1]合肥工业大学微电子学院,安徽合肥230601

出　　处：《合肥工业大学学报（自然科学版）》2024年第6期762-766,共5页Journal of Hefei University of Technology：Natural Science

基　　金：国家自然科学基金区域创新发展联合基金资助项目(U19A2053)。

摘　　要：文章采用5 V、0.35μm CMOS工艺,设计一种适用于低噪声高速系统的带隙基准电压源电路。为了保证电路具有较高的电源抑制比(power supply rejection ratio,PSRR),设计一种抑制电源电压波动的负反馈回路,并且在电路中采用具有较高增益的两级放大器结构。针对某些系统快速启动的需求,设计快速启动电路,当电源上电时启动电路直接作用于基准电压,加速带隙基准电路的启动,在电路正常启动后通过开关管使启动电路停止工作。仿真结果表明,温度在-40~125℃范围内,带隙基准的温漂系数为13.05×10^(-6)℃^(-1);低频时PSRR为100.6 dB;线性调整率(line regulation,LNR)为0.024 mV/V;启动时间为4μs。Based on 5 V 0.35μm CMOS process,this paper proposes a bandgap voltage reference circuit suitable for low-noise and high-speed systems.In order to ensure that the circuit has a higher power supply rejection ratio(PSRR),a negative feedback loop is designed to suppress the fluctuation of the power supply,and a two-stage amplifier structure with higher gain is used in the circuit.A fast start-up circuit is designed to meet the requirements of some high-speed systems for the start-up sequence.When the power supply starts to be turned on,the fast start-up circuit directly acts on the reference voltage,which accelerates the start-up of the bandgap reference.After the bandgap voltage reference is normally started,the start-up circuit stops working by turning off the transistors quickly.According to the simulation results,the proposed bandgap voltage reference has a temperature drift coefficient of 13.05×10^(-6)℃^(-1) between-40℃and 125℃and the PSRR at low frequency is 100.6 dB.In addition,its line regulation(LNR)and starting time are 0.024 mV/V and 4μs,respectively.

关 键 词：电源抑制比(PSRR) 快速启动 带隙基准 负反馈回路 温漂系数 线性调整率(LNR) 

分 类 号：TN432[电子电信—微电子学与固体电子学]