应用于热电能量收集的低压自启动电路  

A Low Voltage Self-Starting Circuit for Thermoelectric Energy Harvesting

作　　者：崔鹏 韦保林[1] 梁展荣 宣艳[2] 徐卫林[1] 韦雪明[1] 段吉海[1] CUI Peng;WEI Baolin;LIANG Zhanrong;XUAN Yan;XU Weilin;WEI Xueming;DUAN Jihai(Guangxi Key Lab.of Precision Naviga.Technol.and Applic.,Guilin Univ.of Elec.Technol,Guilin 541004,P.R.China;Nari Technology Co.,Ltd.,Nanjing 211106,P.R.China)

机构地区：[1]桂林电子科技大学广西精密导航技术与应用重点实验室,桂林541004 [2]国电南瑞科技股份有限公司,南京211106

出　　处：《微电子学》2021年第3期308-313,共6页Microelectronics

基　　金：国家自然科学基金资助项目(61861009);广西自然科学基金资助项目(2017GXNSFAA198224,2018GXNSFAA138130);广西桂林电子科技大学研究生科研创新项目(2019YCXS039,2019YCXS023)。

摘　　要：设计了一种两级低电压自启动电路,实现低输入电压条件下热电能量收集系统的自启动。在第一级自启动电路中引入一种新型堆叠式反相器,构成环形振荡器结构,在低供电电压下产生较大的振荡摆幅;第二级自启动电路由高幅值时钟产生电路与电感复用升压电路构成,进一步提高输出电压;由电压检测电路以及辅助电路构成的控制电路实现了第一级自启动向第二级自启动的转换,以及第二级自启动向主升压转换的过程。基于0.18μm CMOS工艺设计该自启动电路,版图后仿真结果表明,在190mV的TEG输入电压,以及11.8μA的负载电流情况下,自启动电路可产生825mV输出电压,转换效率可达到56.5%,实现能量收集系统的自启动功能,保证后级主升压电路的正常工作。A two-stage low voltage self-starting circuit was designed for thermoelectric energy collection systems under low input voltages.A novel stacked inverter was introduced in the first stage to form a ring oscillator that could be used to generate large oscillation amplitudes at low supply voltages.The second stage consisted of a highamplitude clock generation circuit and a multiplexing-inductor boost circuit,further enhancing the output voltage.The control circuit,which was constituted by voltage detection circuits and auxiliary circuits,realized the transition from the first stage to the second and from the second stage to the main boost.The circuit was design in a 0.18μm CMOS process.As shown by the results of the post-layout simulation,at a TEG input voltage of 190mV and a load current of 11.8μA,the circuit could generate an output voltage of 825mV with a conversion efficiency of 56.5%.Self-starting was realized in the energy collection system,guaranteeing the normal operations of the post-stage main boost circuits.

关 键 词：热电能量收集 低压自启动 升压变换器 CMOS集成电路 

分 类 号：TN432[电子电信—微电子学与固体电子学]