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Abstract:
Brain-machine interface(BMI) with implantable bioelectronics systems can provide an alternative way to cure neural diseases, while a wireless power transfer (WPT) system plays an important role in providing a stable voltage supply for the implanted chip. A WPT for multichannel neural stimulators with high power conversion efficiency(PCE) and low power dissipation over a large loading range is proposed in this work. Both the internal Vth cancelation (IVC) and the dynamic bulk modulation (DBM) schemes are used to maximize the PCE of rectifiers. Besides, a reverse nested miller compensation (RNMC) LDO with a transient enhancer is proposed for the WPT system. Simulation results show that the total PCE is 55% at its peak, and the power consumption is 0.55 mW and 22.5 mW at standby (SB) and full stimulation (ST) load, respectively. For a full load transition, the overshoot and downshoot of the LDO are 110 mV and 71 mV, respectively, which help improve the load transient response during neural stimulation.
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2022 IEEE ASIA PACIFIC CONFERENCE ON CIRCUITS AND SYSTEMS, APCCAS
Year: 2022
Page: 128-133
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ESI Highly Cited Papers on the List: 0 Unfold All
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30 Days PV: 4
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