A 6.78 MHz Maximum Efficiency Tracking Active Rectifier with Load Modulation Control for Wireless Power Transfer to Implantable Medical Devices

被引：1
|
作者：
Rizzo, Tommaso [1 ,2 ]
Catania, Alessandro [1 ]
Bertolacci, Gabriele [2 ]
Strangio, Sebastiano [1 ]
Iannaccone, Giuseppe [1 ]
机构：
[1] Univ Pisa, Dipartimento Ingn Informaz, Via G Caruso 16, I-56126 Pisa, Italy
[2] Quantavis Srl, I-56123 Pisa, Italy
来源：
2022 29TH IEEE INTERNATIONAL CONFERENCE ON ELECTRONICS, CIRCUITS AND SYSTEMS (IEEE ICECS 2022) | 2022年
基金：
欧盟地平线“2020”;
关键词：
implantable medical devices; wireless power transfer; load modulation; active rectifier; TRANSIENT-RESPONSE;
D O I：
10.1109/ICECS202256217.2022.9971042
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
This paper presents a novel integrated wireless power transfer receiver for implantable medical devices, including a load-modulation feedback loop and an active rectifier with maximum efficiency tracking technique. The feedback loop enables the control of the power delivered to the load by means of a frequency modulation of the receiver load, introducing an efficiency loss of only 1.64 %. The active rectifier maximizes the efficiency of the link through a second feedback calibration loop of the off-transition of the active diodes, showing a Voltage Conversion Ratio of 0.98 and a Power Conversion Efficiency between 0.86 and 0.91 for a wide range of load conditions. The chip was designed in the 180 nm BCD-on-SOI XFAB technology and evaluated with accurate electrical simulations and Monte Carlo runs.
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页数：4
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