A Wireless Powered Implantable and Flexible Neural Recording and Stimulating System Based on NFC Protocol

A wireless-powered implantable sensor tag for neural recording and brain stimulation (NRS) based on standard Near Field Communication (NFC) protocol is presented. A NRS system is thus established with this dedicated but flexible sensor tag and a Proximity Coupling Device (PCD), which can be replaced with an NFC smart phone. The flexible printed sensor tag consists of a customized NRS System on Chip (SoC) and a customized NFC Proximity Card (PICC) SoC. Neural signals are captured by the sensor tag and transmitted to the PCD wirelessly. The measured signal-to-noise-and-distortion-rate (SNDR) was 35 dB in vitro.