An implantable 455-active-electrode 52-channel CMOS neural probe

Several studies have demonstrated that understanding certain brain functions can only be achieved by simultaneously monitoring the electrical activity of many individual neurons in multiple brain areas [1]. Therefore, the main tradeoff in neural probe design is between minimizing the probe dimensions and achieving high spatial resolution using large arrays of small recording sites. Current state-of-the-art solutions are limited in the amount of simultaneous readout channels [2], contain a small number of electrodes [2,3] or use hybrid implementations to increase the number of readout channels [3,4].

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