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The authors present the NeuralWISP, a wireless neural interface operating from harvested RF energy. The NeuralWISP is compatible with commercial RFID readers and operates at a range up to 1m. It includes a custom low-noise, low power amplifier IC for processing the neural signal and an analog spike detection circuit for reducing digital computational requirements and communications bandwidth. Their system monitors the neural signal and periodically transmits the spike density in a user programmable time window. The entire system draws an average 20?A from the harvested 1.8V supply.
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