J4 ›› 2015, Vol. 42 ›› Issue (6): 118-123.doi: 10.3969/j.issn.1001-2400.2015.06.021

• 研究论文 • 上一篇    下一篇

一种用于振动能量获取的接口电路

王静敏;杨正;杨银堂   

  1. (西安电子科技大学 微电子学院,陕西 西安  710071)
  • 收稿日期:2014-11-21 出版日期:2015-12-20 发布日期:2016-01-25
  • 通讯作者: 王静敏
  • 作者简介:王静敏(1987-),女,西安电子科技大学博士研究生,E-mail:xidian_wangjm@163.com.
  • 基金资助:

    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)

Highly efficient interface circuit for vibrational energy harvesting applications

WANG Jingmin;YANG Zheng;YANG Yintang   

  1. (School of Microelectronic, Xidian Univ., Xi'an  710071, China)
  • Received:2014-11-21 Online:2015-12-20 Published:2016-01-25
  • Contact: WANG Jingmin

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SMIC 0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%.

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

Abstract:

An input-powered vibrational energy harvesting interface circuit is presented. By using a bulk-driven comparator, the lowest input voltage amplitude can be reduced to 02 V. When the input voltage amplitude is low enough, the circuit can automatically shut down by adopting the input-powered, thereby avoiding unnecessary energy loss. Based on standard SMIC 018μm 33V CMOS technology, simulation results show that the voltage conversion efficiency can reach up to 89% when the input voltage equals  02V@100Hz with a load resistance of 40kΩ. The energy conversion efficiency can reach up to 80% when the input voltage equals 025V@100Hz with a load resistance of 40kΩ, and the maximum efficiency can be up to 90%. Input voltages with frequencies in the range of 10~500Hz can be rectified.

Key words: vibrational energy harvesting, an input-powered, CMOS active rectifier, active diode, subthreshold region, bulk-driven