低成本多路输出CMOS带隙基准电压源设计  

Design of multi-output CMOS bandgap reference voltage source with low cost

作　　者：蔡元[1] 张涛[1] 

机构地区：[1]武汉科技大学信息科学与工程学院,湖北武汉430081

出　　处：《现代电子技术》2012年第16期130-133,共4页Modern Electronics Technique

基　　金：湖北省教育厅科研项目资助(D20101104);湖北省自然科学基金计划项目(2011CDB234)

摘　　要：在传统Brokaw带隙基准源的基础上,提出一种采用自偏置结构和共源共栅电流镜的低成本多路基准电压输出的CMOS带隙基准源结构,省去了一个放大器,并减小了所需的电阻阻值,大大降低了成本,减小了功耗和噪声。该设计基于华虹1μm的CMOS工艺,进行了设计与仿真实现。Cadence仿真结果表明,在-40～140℃的温度范围内,温度系数为23.6ppm/℃,静态电流为24μA,并且能够产生精确的3V,2V,1V和0.15V基准电压,启动速度快,能够满足大多数开关电源的设计需求与应用。Based on the traditional Brokaw bandgap reference source,a CMOS bandgap reference source structure of low-cost multi-path reference voltage output is presented,which adopts a self-biased structure and cascode current mirror instead of an amplifier.It decreases the demands of the resistance value,and reduces the cost,power consumption and noise greatly.The circuit was implemented with Hua Hong 1μm CMOS technology.Cadence simulation results show that its temperature coefficient is 23.6 ppm/℃ and the quiescent current is 24 μA at the range of-40~140 ℃,it can generate accurate reference voltages of 3 V,2 V,1 V and 0.15 V,has a advantage of fast start-up,and meets the design requirements of the most switching power supplies.

关 键 词：带隙基准源 多路基准电压输出 温度系数 CADENCE 

分 类 号：TN710-34[电子电信—电路与系统]