一种面向脉宽调制器的电压基准电路  

Design of voltage reference circuit in PWM

作　　者：陆明华[1,2] 郎君[1,2] 杨盛光[1,2] 周松明[1,2] 何书专[1,2] 高明伦[1,2] 

机构地区：[1]南京大学物理系微电子设计研究所 [2]南京大学江苏省光电信息功能材料重点实验室南京210093

出　　处：《电子测量技术》2006年第6期42-43,50,共3页Electronic Measurement Technology

摘　　要：本文讨论了一种面向DC/DC脉宽调制器(PWM)的能隙基准电压电路,电路采用两级高增益运放的结构。基于Hynix0.5mCMOS工艺模型的模拟结果表明电路输出基准电压为1.188V;在-20100℃温度变化范围内,温度系数仅为16.7ppm/K;在25V工作电压范围内,电源灵敏度仅为0.047mV/V。此外,电路软启动的特点很好地解决了芯片上电时的电流浪涌问题。This essay introduced a design of band gap voltage reference circuit in DC/DC PWM. With a structure of two-stage high-gain operational amplifier, the circuit has been verified with 0. 5 m CMOSprocess. Pspice simulation results show that the output voltage is 1. 188 V, and the temperature coefficient is only 16. 7 ppm/K in the temperature range from-20 to 100℃, and the voltage sensitivity is only 0. 047 mV/V in the voltage range from 2 to 5 V, and the characteristic of soft start avoids the inrush current in the start of the whole chip.

关 键 词：脉宽调制器 电压基准 软启动 

分 类 号：TN32[电子电信—物理电子学]