A 500µW neural tag with 2µVrms AFE and frequency-multiplying MICS/ISM FSK transmitter

Advances in electronic-neural interfaces have shown great potential for both neuroscience research and medical devices. Much of the work to date has focused on short-range inductive links for power and communication transfer. There is an emerging need for active miniaturized systems that stream neural data in the far field, which would enable the observation of brain activity in unconstrained animals such as mice or moths. Such systems cannot rely on near-field power transfer, and must be powered by small batteries or energy harvesters. We present a 500 muW fully integrated neural interface that wirelessly streams a digitized neural waveform over 15 m.