摘要
设计了一种应用于物联网芯片的极低功耗电压基准源。由于漏致势垒降低(Drain-Induced Barrier Lowering,DIBL)效应,栅致漏极泄漏(Gate-Induced Drain Leakage,GIDL)效应及栅-漏电容馈通效应的影响,传统的基于MOS管漏电流的皮安级电压基准源虽然可以实现较低的温度系数,但是线性调整率及电源抑制比(Power Supply Rejection Ratio,PSRR)过低,大大限制了其在具有高电源噪声的物联网芯片中的应用。在传统的双MOS管电压基准源基础上,基于0.18μm CMOS工艺,设计了一种新型的自稳压五MOS管电压基准源。Spectre仿真结果显示,0~120℃范围内,该自稳压五MOS管电压基准源的平均温度系数为39.2 ppm/℃;电源电压1.0~2.0 V范围内,该电压基准源的线性调整率为33.4 ppm/V;负载电容3 pF情况下,该电压基准的PSRR性能为-9 dB@0.01 Hz及-62 dB@100 Hz。另外,在该0.18μm CMOS工艺下,该电压基准的电流消耗仅为59 pA@27℃,版图面积仅为5 400μm^2。
An ultra-low power consumption voltage reference for Internet-of-things chips is proposed in this paper.Due to the drain-induced barrier lowering(DIBL)effect,gate-induced drain leakage(GIDL)effect and gate-drain capacitance feedthrough effect,the conventional pico-ampere voltage references based on leakage current characteristic can obtain low temperature coefficients.However,the line regulation and power supply rejection ratio(PSRR)are too low to apply in the mixed-signal Internet-of-things chips with high power supply noise.Based on the conventional two-MOSFET voltage reference and a 0.18μm CMOS process,we proposed a novel self-regulated five-MOSFET voltage reference.Simulation results shows that the mean temperature coefficient is 39.2 ppm/℃over the temperature range from 0℃to 120℃,the line regulation is 33.4 ppm/V over the power supply range from 1.0 V to 2.0 V.With the load capacitance of 3 pF,the performance of PSRR is-92 dB@0.01 Hz and-62 dB@100 Hz.In addition,with the 0.18μm CMOS process,the current comsumption is only 59 pA@27℃,the layout size is only 5 400μm^2.
作者
周爽
陈新伟
Zhou Shuang;Chen Xinwei(Department of Internet of Things Technology,Qiandongnan Vocational&Technical College For Nationalities,Kaili 556000,China;Fuzhou Joint Laboratory of Robot Technology Application,Fujian Provincial Key Laboratory of Information Processing and Intelligent Control,Fuzhou 350108,China)
出处
《电子技术应用》
2019年第11期42-46,共5页
Application of Electronic Technique
关键词
电压基准
线性调整率
PSRR
物联网
voltage reference
line regulation
PSRR
Internet of Things
