摘要
电流模带隙基准源(CMBGR)在低电源电压电路中得到广泛的应用,但其启动行为仍值得关注。在启动电路不可靠的情况下,CMBGR会导致芯片失效,使得成品率下降。在分析CMBGR的启动和多个工作点问题后,提出一种只有两个稳定工作点的CMBGR,可通过监测电路状态和控制启动电路的充电来解决简并点问题。采用0.13μm CMOS工艺,对提出的GMBGR电路进行设计与仿真。仿真结果表明,该电路产生的参考电压小于1.25 V,在-25℃~125℃之间的温度系数为4.7×10^-6/℃,具有良好的启动性能。
The current mode bandgap reference(CMBGR) has been widely used in low supply voltage applications, but its start-up behavior deserves more attention. The CMBGR without a robust start-up circuit may lead to the chip failure and low yield. After analyzing the issues of start-up and multiple operating points of the CMBGR, a new type of CMBGR with only two stable operating points was proposed. The degenerate point problem could be solved by monitoring the circuit state and controlling the charging of the start-up circuit. The circuit was designed in a 0.13 μm CMOS process. The simulation results showed that the proposed circuit generated a reference voltage less than 1.25 V. It had a temperature coefficient of 4.7×10^-6/℃ from-25 ℃ to 125 ℃, and exhibited a robust start-up behavior.
作者
王恬
虞致国
宋鑫宇
吴江
顾晓峰
WANG Tian;YU Zhiguo;SONG Xinyu;WU Jiang;GU Xiaofeng(Engineering Research Center of Internet of Things Technology Applications(Ministry of Education),Department of Electronic Engineering,Jiangnan University,Wuxi,Jiangsu214122,P.R.China)
出处
《微电子学》
CAS
北大核心
2020年第4期491-494,共4页
Microelectronics
基金
中央高校基本科研业务费专项资金项目(JUSRP51510)
江苏省研究生科研与实践创新计划项目(SJCX18_0647)。
关键词
电流模带隙基准源
启动电路
简并点
温度系数
current mode bandgap reference
start-up circuit
degenerate point
temperature coefficient
