An Efficient Piezoelectric Energy Harvesting Interface Circuit Using a Bias-Flip Rectifier and Shared Inductor

作者：Ramadass Yogesh K^*; Chandrakasan Anantha P

来源：IEEE Journal of Solid-State Circuits, 2010, 45(1): 189-204.

DOI：10.1109/JSSC.2009.2034442

• Bias-flip rectifier
• DC-DC converter
• full-bridge rectifier
• inductor sharing
• micropower
• piezoelectric harvester

Harvesting ambient vibration energy through piezoelectric means is a popular energy harvesting technique which can potentially supply 10-100's of mu W of available power. One of the main limitations of existing piezoelectric harvesters is in their interface circuitry. In this paper, a bias-flip rectifier circuit that can improve the power extraction capability from piezoelectric harvesters over conventional full-bridge rectifiers and voltage doublers by greater than 4X is implemented in a 0.35 mu m CMOS process. An efficient control circuit to regulate the output voltage of the rectifier and recharge a storage capacitor is presented. The inductor used within the bias-flip rectifier is shared efficiently with a multitude of switching DC-DC converters within the system reducing the overall component count.

• 出版日期2010-1