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A 13.56MHz Current-Mode Wireless Power and Data Receiver with Efficient Power Extracting Controller and Energy-Shift Keying Technique for Loosely Coupled Implantable Devices

Authors
Hong, Sung-Wan
Issue Date
Feb-2020
Publisher
Institute of Electrical and Electronics Engineers Inc.
Citation
Digest of Technical Papers - IEEE International Solid-State Circuits Conference, v.2020-Febru, pp 486 - 488
Pages
3
Journal Title
Digest of Technical Papers - IEEE International Solid-State Circuits Conference
Volume
2020-Febru
Start Page
486
End Page
488
URI
https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/1610
DOI
10.1109/ISSCC19947.2020.9062923
ISSN
0193-6530
2376-8606
Abstract
To supply power to implantable systems, wireless power transfer (WPT) is an attractive solution. There are two types of WPT receivers (RXs), voltage-mode (VM) RX [1], [2] and current-mode (CM) RX [3], [4]. The VM-RX is suitable when the coupling coefficient (k12) between the transceiver (TX) and the RX coils is sufficiently high. However, in many practical cases, the k12 is low because of a considerably small implanted RX coil and/or the relatively long distance between the TX and RX coils, as shown in Fig. 32.1.1 (top). In this case, the CM-RX is more suitable. To receive a lower power from the TX, the CM-RX stores power in its LC tank by resonance and transfers the energy to a battery when the energy reaches the optimal level.
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