Design and Performance Evaluation of CMOS-Integrated Power Processing Interface for Bending Beam Piezoelectric Energy Harvesters

In Proceeding of Power MEMS 2011 Conference, Seoul, South Korea, Nov. 2011.

Authors: Nasrin Rezaei-Hosseinabadi ; Ahmadreza Tabesh ; Rasoul Dehghani

Abstract: This paper presents the design of a CMOS integrated circuit for power processing of a piezoelectric energy harvester device. The designed circuitry includes an integrated circuit for the rectifier and step-down converter blocks of the power processing unit. It uses 0.18 CMOS technology to reduce the power consumption of the circuit and to improve the efficiency of the power converter. The performance of the designed integrated stepdown converter was evaluated using time-domain simulation via electronic software tools. It has been shown that the efficiency of the converter for the fixed duty-cycle of 10% remains above 87.2% in a wide range of frequencies.