基于环境微弱能量收集的低阈值CMOS电路设计  

Design of CMOS Low Threshold Circuit for Ambient Weak Energy Harvester

作　　者：潘祎雯 白雪[1] 赵文祥[1] 徐雷钧[1] Pan Yiwen Bai Xue Zhao Wenxiang Xu Leijun(School of Electrical and Information Engineering, Jiangsu University, Zhenjiang 212013, China)

机构地区：[1]江苏大学电气信息工程学院,江苏镇江212013

出　　处：《半导体技术》2016年第12期889-893,共5页Semiconductor Technology

基　　金：中国博士后科学基金资助项目(2015M570414);江苏省自然科学基金资助项目(BK20161352);江苏高校优势学科建设工程资助项目(PAPD)

摘　　要：环境中存在着丰富的电磁波能量,而人体运动产生的机械能则是一种不受外界干扰非常稳定的能源,这些能源的存在使设备为自身供电成为可能。由于射频电磁波能量和振动能量密度低的特性,设计了一种能够匹配低功耗低电压的复合能量收集与管理电路。该电路采用0.18μm标准CMOS工艺,对电源转化模块、电源调节模块(整流电路、滤波电路、升压电路,以及为升压电路提供时钟信号的振荡电路)和储能模块进行了分析与设计。整流电路的最低输入电压为200 m V,整流效率达到75%。升压电路采用新型电荷泵电路,具有4.8倍升压效果,输出电压最高达到970 m V,电压纹波率为0.5%。当输入电流为50μA时,该电路转换率为10%,输出平均功率为1.14μW。There is abundant of electromagnetic wave energy in the environment and vibration energy produced by the human motion is a kind of stable energy,totally free from outside interference. This energy source makes it possible for the device to be self-powered. Since the density of the RF and vibration energy in the environment is low,a multi-energy harvester circuit capable of matching low power and low voltage was designed. By using 0. 18 μm standard CMOS process, the power supply conversion module,power conditioning module（ rectifier circuit, filter circuit, boosting circuit, and oscillation circuit which is providing the clock signal for the booster circuit） and energy storage power module were designed and analyzed. The minimum input voltage of the rectifier circuit is 200 m V,the rectification efficiency reaches 75%. The boost circuit employs a new charge pump circuit,the output voltage can reach 970 m V,which is 4. 8 times of the input voltage and the voltage ripple rate is 0. 5%. When the input current is 50 μA,the conversion rate is about 10%. The energy output to the average power of the circuit is 1. 14 μW.

关 键 词：互补金属氧化物半导体(CMOS) 环境能量收集 低阈值 整流 电荷泵 

分 类 号：TN432[电子电信—微电子学与固体电子学]