A Fully Integrated Split-Electrode SSHC Rectifier for Piezoelectric Energy Harvesting

TY - JOUR

T1 - A Fully Integrated Split-Electrode SSHC Rectifier for Piezoelectric Energy Harvesting

AU - Du, Sijun

AU - Jia, Yu

AU - Zhao, Chun

AU - Amaratunga, Gehan A.J.

AU - Seshia, Ashwin A.

N1 - Funding Information: Manuscript received August 8, 2018; revised November 24, 2018; accepted January 8, 2019. Date of publication February 14, 2019; date of current version May 24, 2019. This paper was approved by Guest Editor Wing-Hung Ki. This work was supported by the U.K. Engineering and Physical Sciences Research Council under Grant EP/L010917/1 and Grant EP/N021614/1. (Corresponding author: Ashwin A. Seshia.) S. Du is with the Department of Engineering, University of Cambridge, CB2 1PZ Cambridge, U.K., and also with the Department of Electrical Engineering and Computer Sciences, University of California at Berkeley, Berkeley, CA 94720 USA (e-mail: [email protected]). Publisher Copyright: © 1966-2012 IEEE.

PY - 2019/2/14

Y1 - 2019/2/14

N2 - In order to efficiently extract power from piezoelectric vibration energy harvesters, various active rectifiers have been proposed in the past decade, which include synchronized switch harvesting on inductor (SSHI), synchronous electric charge extraction (SECE), and so on. Although reported active rectifiers show good performance improvements compared to full-bridge rectifiers (FBRs), large off-chip inductors are typically required and the system volme is inevitably increased as a result, counter to the requirement for system miniaturization. In this paper, a fully integrated split-electrode synchronized switch harvesting on capacitors (SSHC) rectifier is proposed, which achieves significant performance enhancement without employing any off-chip components. The proposed circuit is designed and fabricated in a 0.18-μ m CMOS process and it is co-integrated with a custom microelectromechanical systems (MEMS) piezoelectric transducer with its electrode layer equally split into four regions. The measured results show that the proposed rectifier can provide up to 8.2 × and 5.2 × boost, using on-chip and off-chip diodes, respectively, in harvested power compared to an FBR under low excitation levels and the peak rectified output power achieves 186 μ W.

AB - In order to efficiently extract power from piezoelectric vibration energy harvesters, various active rectifiers have been proposed in the past decade, which include synchronized switch harvesting on inductor (SSHI), synchronous electric charge extraction (SECE), and so on. Although reported active rectifiers show good performance improvements compared to full-bridge rectifiers (FBRs), large off-chip inductors are typically required and the system volme is inevitably increased as a result, counter to the requirement for system miniaturization. In this paper, a fully integrated split-electrode synchronized switch harvesting on capacitors (SSHC) rectifier is proposed, which achieves significant performance enhancement without employing any off-chip components. The proposed circuit is designed and fabricated in a 0.18-μ m CMOS process and it is co-integrated with a custom microelectromechanical systems (MEMS) piezoelectric transducer with its electrode layer equally split into four regions. The measured results show that the proposed rectifier can provide up to 8.2 × and 5.2 × boost, using on-chip and off-chip diodes, respectively, in harvested power compared to an FBR under low excitation levels and the peak rectified output power achieves 186 μ W.

KW - Energy harvesting

KW - fully integrated system

KW - piezoelectric transducers (PTs)

KW - power conditioning

KW - rectifiers

KW - switched capacitors (SCs)

KW - synchronized switch harvesting on capacitors (SSHC)

KW - synchronized switch harvesting on inductor (SSHI)

UR - http://www.scopus.com/inward/record.url?scp=85066427328&partnerID=8YFLogxK

U2 - 10.1109/JSSC.2019.2893525

DO - 10.1109/JSSC.2019.2893525

M3 - Article

AN - SCOPUS:85066427328

SN - 0018-9200

VL - 54

SP - 1733

EP - 1743

JO - IEEE Journal of Solid-State Circuits

JF - IEEE Journal of Solid-State Circuits

IS - 6

M1 - 8642406

ER -