A 13.56 MHz Active Rectifier with PMOS AC-DC Interface for Wireless Powered Medical Implants

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A 13.56 MHz Active Rectifier with PMOS AC-DC Interface for Wireless Powered Medical Implants
Title:
A 13.56 MHz Active Rectifier with PMOS AC-DC Interface for Wireless Powered Medical Implants
Journal Title:
2021 IFIP/IEEE 29th International Conference on Very Large Scale Integration (VLSI-SoC)
Keywords:
Publication Date:
17 November 2021
Citation:
Zhao, J., & Gao, Y. (2021). A 13.56 MHz Active Rectifier with PMOS AC-DC Interface for Wireless Powered Medical Implants. 2021 IFIP/IEEE 29th International Conference on Very Large Scale Integration (VLSI-SoC). https://doi.org/10.1109/vlsi-soc53125.2021.9606992
Abstract:
A 13.56 MHz active rectifier for wireless powered medical implants is presented in this paper. Only PMOS power transistors are used in the AC-DC interface in the active rectifier to prevent the inherent parasitic diode conduction that may lead to potential latch-up during the rectifier start-up period. To eliminate the reverse current introduced by the delay of comparator signal, a delay compensation loop is designed to dynamically adjust the rectifier at various DC output. A fully onchip 2× charge pump and capacitor assisted driver/sampling circuits are proposed to turn on/off the power PMOS in the rectifier. The rectifier is implemented in a standard 0.18-μ m CMOS process with a core active area of 0.4 mm ×0.9 mm. The measurement results show that this PMOS rectifier achieves peak power efficiency of 85% when load resistor is 500Ω and the DC output voltage range is 2V--3.5V.
License type:
Publisher Copyright
Funding Info:
This research / project is supported by the A*STAR - Programmatic
Grant Reference no. : A18A4b0055
Description:
© 2021 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works
ISSN:
2324-8440
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