基于PWM的低温度依赖基准电压电路设计  

Design of low temperature dependence voltage reference circuit for PWM

作　　者：吴铁峰[1,2] 张鹤鸣[1] 胡辉勇[1] 李敏[1] 

机构地区：[1]西安电子科技大学微电子学院宽禁带半导体材料与器件重点实验室,陕西西安710071 [2]佳木斯大学信息电子技术学院,黑龙江佳木斯154007

出　　处：《中南大学学报（自然科学版）》2010年第6期2269-2273,共5页Journal of Central South University:Science and Technology

基　　金：国家部委基金资助项目(9140C0905040706)

摘　　要：为了给脉宽调制（PWM）控制器提供稳定的工作电压,基于齐纳二极管的正温度系数和三极管B-E结的负温度系数之间的温度补偿原理,设计1个结构简单、性能优越的高精度基准电压电路,并应用华越SB45双极工艺在Candence中进行仿真。研究结果表明：该电路能够提供多路稳定的基准工作电压,而且具有较高的电源电压抑制比,对温度依赖程度很小;在-55~125℃范围内,该电路的温度系数为1.2×10-6/℃;当电源电压为8~30 V时,线性调整率约为0.4 mV/V,电源电压抑制比为77.54 dB,能够满足PWM控制器的工作需求。In order to provide steady voltage for PWM controller,the design of a high precision bipolar voltage reference circuit which is simple in structure and high performance was presented.The circuit based on the compensation principle between positive temperature coefficient of Zener diode and negative one of B-E junction of triode was used in PWM controller and multi-way steady voltages were brought out.The results show that there is a high power supply rejection ratio（PSRR） with low temperature dependence.The temperature coefficient is about 1.2×10-6 /℃ at -55-125 ℃.The line regulation is about 0.4 mV/V in the power supply voltage range from 8 V to 30 V and the PSRR 77.54 dB.The design of circuit can satisfy the requirements for PWM controller.

关 键 词：电压基准 脉宽调制控制器 温度系数 温度补偿 双极工艺 模拟电路 

分 类 号：TN431.1[电子电信—微电子学与固体电子学]