[1] R F Xue, K W Cheng, M Jie. High-efficiency wireless power transfer for biomedical implants by optimal resonant load transformation. Circuits Syst I, 60, 867(2013).

[2]

[3] C H Liu, C Q Jiang, J G Song et al. An efficiency sandwiched wireless power transfer system for charging implantable cardiac pacemaker. IEEE Trans Ind Electron, 66, 4108(2019).

[4] A Kurs, A Karalis, R Moffatt et al. Wireless power transfer via strongly coupled magnetic resonances. Science, 317, 83(2007).

[5] S O’Driscoll, A S Y Poon. Meng T H. A mm-sized implantable power receiver with adaptive link compensation. IEEE International Solid-State Circuits Conference, 294(2009).

[6] B Lee, M Kiani, M Ghovanloo. A triple-loop inductive power transmission system for biomedical applications. IEEE Trans Biomed Circuits, 10, 138(2016).

[7] W S Zhou, S Sandeep, P D Wu et al. A wideband strongly coupled magnetic resonance wireless power transfer system and its circuit analysis. IEEE Microwave Wireless Compon Lett, 28, 1152(2018).

[8]

[9] L Liu, L He, Y Zhang et al. A battery-less portable ECG monitoring system with wired audio transmission. IEEE Trans Biomed Circuits Syst, 13, 697(2019).

[10] T Mury, V F Fusco. Series-L/parallel-tuned comparison with shunt-C/series-tuned class-E power amplifier. IEE Proc-Circuits, Devices Syst, 152, 709(2005).

[11] A Kumar, S Mirabbasi, M Chiao. Resonance-based wireless power delivery for implantable devices. Proc IEEE Biomedical Circuits and Systems Conf, 25(2009).

[12] L B Qian, J F Sang, Y S Xia et al. Investigating on through glass via based RF passives for 3-D integration. IEEE J Electron Devices Soc, 6, 755(2018).

[13] H Xu, U Bihr, J Becker et al. A multi-channel neural stimulator with resonance compensated inductive receiver and closed-loop smart power management. IEEE International Symposium on Circuits and Systems, 638(2013).

[14] D W Seo, S T Khang, S C Chae et al. Open-loop self-adaptive wireless power transfer system for medical implants. Microwave Opt Technol Lett, 58, 1271(2016).