一种用于振动能量获取的接口电路  

Highly efficient interface circuit for vibrational energy harvesting applications

作　　者：王静敏[1] 杨正[1] 杨银堂[1] 

机构地区：[1]西安电子科技大学微电子学院,陕西西安710071

出　　处：《西安电子科技大学学报》2015年第6期118-123,共6页Journal of Xidian University

基　　金：国家自然科学基金资助项目(61234002,61322405,61306044,61376033);国家863计划资助项目(2012AA012302,2013AA014103)

摘　　要：提出了一种应用于振动能量获取的低压高效接口电路.采用输入电压作为接口电路的电源电压,当输入电压较低时,整个接口电路处于休眠状态,电路无功耗,从而提高了电路的能量转换效率.整流器中的比较器采用衬底输入,有效地降低了电路对电源电压的要求,使得最低输入电压仅为0.2V.基于SMIC0.18μm 3.3V标准CMOS工艺,采用Cadence Spectre进行了仿真验证.当输入电压为0.2V(100Hz),负载为40kΩ时,电压转换效率高达89%;当输入电压为0.25V(100Hz),负载为40kΩ时,能量转换效率达到80%,电路的最大能量转换效率高达90%.An input-powered vibrational energy harvesting driven eomparator, the lowest input voltage amplitude can amplitude is low enough, the circuit can automatically shut avoiding unnecessary energy loss. Based on standard SMIC results show that the voltage conversion efficiency can reach interface circuit is presented. By using a bulk- be reduced to 0.2 V. When the input voltage down by adopting the input-powered, thereby 0. 18μm 3.3 V CMOS technology, simulation up to 89 % when the input voltage equals 0. 2 V @100 Hz with a load resistance of 40 kΩ. The energy conversion efficiency can reach up to 80% when the input voltage equals 0.25 V@100 Hz with a load resistance of 40 kΩ, and the maximum efficiency can be up to 90%. Input voltages with frequencies in the range of 10-500 Hz can be rectified.

关 键 词：振动能量获取 输入供电 CMOS有源整流器 有源二极管 亚阈值 衬底驱动 

分 类 号：TN4[电子电信—微电子学与固体电子学]