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Author:

Liang, Weisong (Liang, Weisong.) | Liu, Xu (Liu, Xu.) | Chen, Weijian (Chen, Weijian.) | Lu, Zeyu (Lu, Zeyu.) | Wan, Peiyuan (Wan, Peiyuan.) | Chen, Zhijie (Chen, Zhijie.)

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CPCI-S EI Scopus

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.

Keyword:

PCE Rectifier LDO Wireless Power Neural Stimulator

Author Community:

  • [ 1 ] [Liang, Weisong]Beijing Univ Technol, Coll Microelect, Fac Informat, Beijing, Peoples R China
  • [ 2 ] [Liu, Xu]Beijing Univ Technol, Coll Microelect, Fac Informat, Beijing, Peoples R China
  • [ 3 ] [Chen, Weijian]Beijing Univ Technol, Coll Microelect, Fac Informat, Beijing, Peoples R China
  • [ 4 ] [Lu, Zeyu]Beijing Univ Technol, Coll Microelect, Fac Informat, Beijing, Peoples R China
  • [ 5 ] [Wan, Peiyuan]Beijing Univ Technol, Coll Microelect, Fac Informat, Beijing, Peoples R China
  • [ 6 ] [Chen, Zhijie]Beijing Univ Technol, Coll Microelect, Fac Informat, Beijing, Peoples R China
  • [ 7 ] [Liang, Weisong]Univ Calif San Diego, Dept Elect & Comp Engn, La Jolla, CA USA

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Source :

2022 IEEE ASIA PACIFIC CONFERENCE ON CIRCUITS AND SYSTEMS, APCCAS

Year: 2022

Page: 128-133

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 4

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