Reconfigurable Resonant Regulating Rectifier With Primary Equalization for Extended Coupling- and Loading-Range in Bio-Implant Wireless Power Transfer

IF 3.8 2区医学 Q2 ENGINEERING, BIOMEDICAL IEEE Transactions on Biomedical Circuits and Systems Pub Date : 2015-12-01 DOI:10.1109/TBCAS.2015.2503418

Xing Li, Xiaodong Meng, C. Tsui, W. Ki

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引用次数: 43

Abstract

Wireless power transfer using reconfigurable resonant regulating ( R3) rectification suffers from limited range in accommodating varying coupling and loading conditions. A primary-assisted regulation principle is proposed to mitigate these limitations, of which the amplitude of the rectifier input voltage on the secondary side is regulated by accordingly adjusting the voltage amplitude Veq on the primary side. A novel current-sensing method and calibration scheme track Veq on the primary side. A ramp generator simultaneously provides three clock signals for different modules. Both the primary equalizer and the R3 rectifier are implemented as custom integrated circuits fabricated in a 0.35 μm CMOS process, with the global control implemented in FPGA. Measurements show that with the primary equalizer, the workable coupling and loading ranges are extended by 250% at 120 mW load and 300% at 1.2 cm coil distance compared to the same system without the primary equalizer. A maximum rectifier efficiency of 92.5% and a total system efficiency of 62.4% are demonstrated.

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可重构谐振调节整流器与初级均衡扩展耦合和负载范围在生物植入物无线电力传输

采用可重构谐振调节(R3)整流的无线电力传输在适应不同的耦合和负载条件时受到范围的限制。提出了一种一次辅助调节原理，通过相应调节一次侧电压幅值Veq来调节整流器二次侧输入电压幅值。一种新颖的电流传感方法和标定方案在一次侧跟踪Veq。一个斜坡发生器同时为不同的模块提供三个时钟信号。主均衡器和R3整流器均采用0.35 μm CMOS工艺定制集成电路实现，全局控制采用FPGA实现。测量表明，与没有主均衡器的相同系统相比，使用主均衡器时，工作耦合和负载范围在120 mW负载时延长了250%，在1.2 cm线圈距离时延长了300%。最大整流器效率为92.5%，系统总效率为62.4%。

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来源期刊

IEEE Transactions on Biomedical Circuits and Systems 工程技术-工程：电子与电气

CiteScore

10.00

自引率

13.70%

发文量

174

审稿时长

3 months

期刊介绍： The IEEE Transactions on Biomedical Circuits and Systems addresses areas at the crossroads of Circuits and Systems and Life Sciences. The main emphasis is on microelectronic issues in a wide range of applications found in life sciences, physical sciences and engineering. The primary goal of the journal is to bridge the unique scientific and technical activities of the Circuits and Systems Society to a wide variety of related areas such as: • Bioelectronics • Implantable and wearable electronics like cochlear and retinal prosthesis, motor control, etc. • Biotechnology sensor circuits, integrated systems, and networks • Micropower imaging technology • BioMEMS • Lab-on-chip Bio-nanotechnology • Organic Semiconductors • Biomedical Engineering • Genomics and Proteomics • Neuromorphic Engineering • Smart sensors • Low power micro- and nanoelectronics • Mixed-mode system-on-chip • Wireless technology • Gene circuits and molecular circuits • System biology • Brain science and engineering: such as neuro-informatics, neural prosthesis, cognitive engineering, brain computer interface • Healthcare: information technology for biomedical, epidemiology, and other related life science applications. General, theoretical, and application-oriented papers in the abovementioned technical areas with a Circuits and Systems perspective are encouraged to publish in TBioCAS. Of special interest are biomedical-oriented papers with a Circuits and Systems angle.