Distributed Microscale Brain Implants with Wireless Power Transfer and Mbps Bi-directional Networked Communications
2019 IEEE Custom Integrated Circuits Conference (CICC)(2019)
摘要
To dramatically increase the scale and spatial resolution for future chronic electrocorticography (ECoG) applications, we propose a wireless brain-machine interface (BMI) system based on a high number (up to 1000) of freely distributed, sub-mm sized (0.25 mm
2
) IC implants. The chip features an onchip antenna for RF energy harvesting at 900 MHz and data backscattering at 10 Mbps. In order to synchronize and time-multiplex the uplink data transmission of the untethered chips, while allowing their oscillators to free-run to save power, a robust Mbps ASK-PWM downlink data protocol based on digital counters was implemented. To the best of our knowledge, this paper presents the first experimental validation of simultaneous wireless power transfer and bi-directional RF data communications on a network of (32) brain implant ICs over a single inductive coupling link.
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关键词
distributed microscale brain implants,spatial resolution,future chronic electrocorticography applications,wireless brain-machine interface system,onchip antenna,RF energy harvesting,data backscattering,uplink data transmission,untethered chips,robust Mbps ASK-PWM downlink data protocol,simultaneous wireless power transfer,wireless BMI system,Mbps bidirectional networked communications,ECoG applications,freely distributed sub-mm sized IC implants,oscillators,power saving,time-multiplexed data transmission,digital counters,bidirectional RF data communications,inductive coupling link,frequency 900.0 MHz,bit rate 10 Mbit/s
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