基于Brokaw结构的低温漂带隙基准源设计
Design of a Low-Temperature-Drift Bandgap Reference Based on the Brokaw Topology
杨娜 1高凤娇 1于洪仕1
作者信息
- 1. 辽宁工程技术大学电子与信息工程学院，辽宁葫芦岛，125105
- 折叠
摘要
针对传统带隙基准电压源在全温范围内温度漂移较大的问题，本文采用分立元件设计了一款基于Brokaw结构的低温度系数带隙基准电压源。电路核心采用精密运算放大器OP07和NPN晶体管2N3904构成反馈环路，通过对双极型晶体管基极-发射极电压的温度非线性进行精确建模分析，设计了基于基极-发射极电压曲率项精确匹配的二阶曲率补偿电路。仿真结果表明：在-40~125 C温度范围内，一阶补偿后的温度系数为163ppm/ C，经曲率补偿后温度系数降至1ppm/ C；输出电压为1.208V，峰-峰波动仅为0.2mV；在2.5~5.5V电源电压范围内线性调整率为0.066%/V；1kHz时电源抑制比(PSRR)为85dB。该电路结构简单、成本低廉，适用于对温度稳定性要求较高的测量与仪表系统。
Abstract
To address the issue of significant temperature drift in conventional bandgap voltage references, a low-temperature-coefficient bandgap voltage reference based on the Brokaw topology is designed using discrete components. The core circuit employs a precision operational amplifier OP07 and NPN transistors 2N3904 to form the feedback loop. Through accurate modeling of the base-emitter voltagetemperature nonlinearity, a second-order curvature compensation circuit based on exact curvature matching is designed. Simulation results show that over the -40C to 125C range, the temperature coefficient is reduced from 163ppm/C (first-order) to 1ppm/C (curvature-compensated), with an output voltage of 1.208V and a peak-to-peak variation of only 0.2mV. The line regulation is 0.066%/V for supply voltages from 2.5V to 5.5V, and the PSRR at 1kHz reaches 85dB. The proposed circuit is simple and cost-effective, suitable for precision measurement and instrumentation systems.关键词
带隙基准/分立元件/曲率补偿/低温度系数/Brokaw结构Key words
bandgap reference/discrete components/curvature compensation/low temperature coefficient/Brokawtopology引用本文复制引用
杨娜,高凤娇,于洪仕.基于Brokaw结构的低温漂带隙基准源设计[EB/OL].(2026-06-16)[2026-06-18].http://www.paper.edu.cn/releasepaper/content/202606-48.学科分类
电子元件、电子组件/电子电路
