带2阶补偿的CMOS带隙基准电压源  

A CMOS Bandgap Reference Voltage Source with 2^(nd)-Order Compensation

作　　者：刘云涛[1,2] 魏锡盟[1] 邵雷[1] 

机构地区：[1]中国科学院微电子研究所,北京100029 [2]哈尔滨工程大学信息与通信工程学院,哈尔滨150001

出　　处：《微电子学》2012年第1期38-41,共4页Microelectronics

基　　金：中央高校基本科研业务费专项资金资助项目(HEUCF110801)

摘　　要：基于CSMC 0.5μm CMOS工艺,设计了一种具有低温度系数、带2阶补偿的带隙基准电压源。在传统放大器反馈结构带隙基准源的基础上,利用MOS器件的"饱和电流与过驱动电压成平方关系"产生2阶补偿量,对传统的带隙基准进行高阶补偿。具有电路实现简单,容易添加到传统带隙基准电路的优点。仿真结果表明,设计的基准电压源在5V电源电压下功耗为860μW,最低工作电压为1.24V,在-50℃～125℃的温度范围内获得了1.42×10-5/℃的温度系数,低频时的电源抑制比达到-86.3dB。A low temperature coefficient bandgap reference voltage source with 2nd-order compensation was designed using CSMC 0.5 μm CMOS process.The circuit was based on conventional bandgap voltage source with amplifier-feedback architecture,and the basic theory of ＂the square relationship between saturation current and over-drive voltage＂ was used to generate a 2nd-order compensation parameter.The circuit was simple for implementation and easily compatible with conventional bandgap circuit.Simulation results indicated that the circuit had a power dissipation of 860 μW at 5 V power supply,a minimum operating voltage of 1.24 V,a temperature coefficient of 1.42×10-5 /℃ in the temperature range from-50 ℃ to 125 ℃,and a PSRR of-86.3 dB at low frequency.

关 键 词：带隙基准源 温度系数 2阶补偿 

分 类 号：TP335[自动化与计算机技术—计算机系统结构]