题目/Title：Narrowband FSK Transceiver Circuit for Wireless Power and Data Transmission in Biomedical Implants
作者/Author：
Xiaojun Ma, Songping Mai
会议/Conference：ISCAS 2022
地点/Location：Austin, TX, USA
年份/Issue Date：2022.27 May-01 Jun.
页码/pages：pp.152-155
摘要/Abstract：
Biomedical implant is very sensitive to volume, so that single coil for wireless power and data transfer (WPDT) is widely used. Frequency-shift keying (FSK) is a robust data modulation scheme with negligible sensitivity to amplitude noise and movements of the transmitter and receiver coils of an inductive link. However, achieving efficient transmission of power while modulating FSK has always been a difficult task, because high data rate FSK requires a broadband modulator. In this paper, we propose a narrowband FSK transceiver scheme, which enables WPDT link to transmit power efficiently when transmitting data. Using this approach, the power transfer efficiency (PTE) and the power delivered to the load (PDL) were measured to be 51.92% and 92.42 mW, respectively. With carrier frequencies of 3.952 and 4.516 MHz, the WPDT link we have implemented can transmit data at a rate of 564.48 kbps, with a 5.35−μH transmitter coil and a 0.7−μH receiver coil. The transmitter SoC is fabricated in a 0.18−μm CMOS technology and occupies 2 mm 2 . We also designed the corresponding demodulation circuit, of which power consumption is 8.49 uW. Our approach is expected to provide a new communication solution for biomedical implants.