Compact self-powered CMOS strain-rate monitoring circuit for piezoelectric energy scavengers
Compact self-powered CMOS strain-rate monitoring circuit for piezoelectric energy scavengers
复制标题
用于压电能量收集器的紧凑型自供电 CMOS 应变率监测电路
DOI：
10.1049/el.2010.3430
复制
发表时间：
2011
影响因子：
1.1
通讯作者：
S. Chakrabartty
中科院分区：
文献类型：
--
作者：
Chao;S. Chakrabartty
自供电传感是指直接从被传感信号中获取用于传感、计算和存储的能量的能量清除方法。提出了一种利用压电能量清除器产生的信号进行应变率自供电传感的16晶体管CMOS电路。通过利用浮栅晶体管上冲击电离热电子注入固有的操作原语，该电路实现了信号速率统计的计算和非易失性存储，而无需电池、中间能量存储、功率调节或模数转换。通过使用基于二极管的模拟延迟线，该电路计算并存储信号速率（应变速率）超过阈值的次数，该阈值可编程为0.6至12 V/s。当在0.5 μ m CMOS技术中原型时，电路占用500×340 μ m硅，测量结果表明功耗小于200nW，这是自供电传感应用的理想选择。
Self-powered sensing refers to an energy scavenging approach where the power for sensing, computation and storage is harvested directly from the signal being sensed. Presented is a 16-transistor CMOS circuit that can be used for the self-powered sensing of strain-rates using signals produced by piezoelectric energy scavengers. By exploiting operational primitives inherent in impact-ionised hot-electron injection on a floating-gate transistor, the proposed circuit achieves computation and non-volatile storage of signal-rate statistics without the aid of batteries, intermediate energy storage, power regulation or analogue-to-digital conversion. By using a diode based analogue delay-line, the proposed circuit computes and stores the number of times the signal-rate (strain-rate) exceeds a threshold which can be programmed from 0.6 to 12 V/s. The circuit occupies 500×340 µm of silicon when prototyped in a 0.5 µm CMOS technology and measured results demonstrate power dissipation less than 200nW, which is ideal for self-powered sensing applications.