A Highly Efficient Fully Integrated Active Rectifier for Ultrasonic Wireless Power Transfer
Yue, X. (TU Delft Electronic Instrumentation)
Chen, Zhelun (Student TU Delft)
Zou, Yiwei (Student TU Delft)
Du, S. (TU Delft Electronic Instrumentation)
Ultrasonic wireless power transfer (WPT) has been proved to be a promising approach to power biomedical implants. To extract the energy generated from the transducer, a rectifier is typically required. Previous inductor-based rectifiers (SSHI and SECE) require a large off-chip inductor to achieve good performance, which is not desired for miniaturization and safety reasons. Synchronized switch harvesting on capacitors (SSHC) rectifiers have been proved to achieve high performance without inductors; however, they are mainly designed for low-frequency kinetic energy harvesting. In this paper, an improved SSHC rectifier is designed to achieve a fully integrated design with all flying capacitors implemented on-chip. The proposed SSHC rectifier can properly operate at ultrasonic excitation frequency (100 KHz) with precise switching time control and ultrafast voltage flipping techniques. In addition, an on-chip ultralow-power LDO allows the system to be self-sustained. The system is designed in a TSMC 180nm BCD technology and post-layout simulation results are presented.
To reference this document use:
Proceedings of the 2022 IEEE International Symposium on Circuits and Systems (ISCAS)
2022 IEEE International Symposium on Circuits and Systems (ISCAS), 2022-05-27 → 2022-06-01, Austin, United States
Proceedings - IEEE International Symposium on Circuits and Systems, 0271-4310, 2022-May
Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.
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© 2022 X. Yue, Zhelun Chen, Yiwei Zou, S. Du