wireless power transfer (WPT)

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A 6.78-MHz Single-Stage Regulating Rectifier With Dual Outputs Simultaneously Charged in a Half Cycle Achieving 92.2% Efficiency and 131 mW Output Power

A 6.78-MHz Single-Stage Regulating Rectifier With Dual Outputs Simultaneously Charged in a Half Cycle Achieving 92.2% Efficiency and 131 mW Output Power 150 150
Author(s): Quanrong Zhuang, Junyi Sun, Bo Li, Jie Lu, Zixu Wang, Qi’an Zhu, Xin Zhang, Yi Shi, Hao Qiu

Abstract:

Targeting the wireless power transfer (WPT) to implantable medical devices (IMDs), this work presents a 6.78 MHz single-stage dual-output (SSDO) regulating rectifier. It can support the simultaneous charging of both outputs ( $V_{\text {OUT1}}$ and $V_{\text {OUT2}}$ , $V_{\text {OUT1}} \gt V_{\text {OUT2}}$ ) in a half cycle, rather than …

Published in: IEEE Journal of Solid-State Circuits
Page(s): 1 – 12
Year of Publication: 2026
Electronic ISSN: 1558-173X
DOI: 10.1109/JSSC.2026.3682308
Publisher: IEEE

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A High-Efficiency Magnetoelectric Power Link With a Load-Adaptive CMOS Rectifier for Miniaturized Implants

A High-Efficiency Magnetoelectric Power Link With a Load-Adaptive CMOS Rectifier for Miniaturized Implants 150 150
Author(s): Yasemin Engür, Mingxiang Gao, Niels Kuster, Mahsa Shoaran

Abstract:

Miniaturized biomedical implants are currently constrained by limited wireless power transfer (WPT) efficiency under load variation and spatial misalignment. This work presents a custom magnetoelectric (ME) power link incorporating a load-adaptive CMOS rectifier to address these challenges. By employing a current sensing control loop for dynamic switch sizing and delay …

Published in: IEEE Solid-State Circuits Letters
Page(s): 125 – 128
Year of Publication: 2026
Electronic ISSN: 2573-9603
DOI: 10.1109/LSSC.2026.3679620
Publisher: IEEE

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A 40.68-MHz Dual-Output Wireless Power Transfer System for Millimeter-Scale Biomedical Implants

A 40.68-MHz Dual-Output Wireless Power Transfer System for Millimeter-Scale Biomedical Implants 150 150
Author(s): Tianqi Lu, Sijun Du

Abstract:

This article presents a single-link, dual-output wireless power transfer (WPT) system operating at 40.68 MHz for miniature, high-power biomedical implants. The elevated carrier frequency enables a millimeter-scale receiver (RX) coil while maintaining link efficiency and output power comparable to low-frequency WPT designs. End-to-end (E2E) efficiency is optimized through global power …

Published in: IEEE Journal of Solid-State Circuits
Page(s): 1 – 14
Year of Publication: 2025
Electronic ISSN: 1558-173X
DOI: 10.1109/JSSC.2025.3617375
Publisher: IEEE

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A 40.68-MHz, 200-ns-Settling Active Rectifier for mm-Sized Implants

A 40.68-MHz, 200-ns-Settling Active Rectifier for mm-Sized Implants 150 150
Author(s): Ronald Wijermars, Yi-Han Ou-Yang, Sijun Du, Dante G. Muratore

Abstract:

This letter describes a fast-settling active rectifier for a 40.68 MHz wireless power transfer receiver for implantable applications. Fast-settling and low power are achieved through a novel direct voltage-domain compensation technique. The rectifier maintains high efficiency during load and link variations required for downlink communication. The system was fabricated in 40nm …

Published in: IEEE Solid-State Circuits Letters
Page(s): 305 – 308
Year of Publication: 2025
Electronic ISSN: 2573-9603
DOI: 10.1109/LSSC.2025.3611484
Publisher: IEEE

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