A Fully-Integrated, Miniaturized (0.125 mm2) 10.5 µW Wireless Neural Sensor.

A wirelessly powered 0.125 mm(2) 65 nm CMOS IC for Brain-Machine Interface applications integrates four 1.5 mu W amplifiers 96.5 mu Vrms input-referred noise with 10 kHz bandwidth) with power conditioning and communication circuitry. The multi-node backscatter frequency locks to a wireless interrogator using a frequency-domain multiple access communication scheme. The full system, verified with wirelessly powered in vivo recordings, consumes 10.5 mu W and operates at 1 mm range in air with 50 mW transmit power.