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Intraneural active probe for bidirectional peripheral nerve interface

Advanced bionic prosthetics that can restore both the motor functionality and sensory perception of an amputee, require high-resolution recording and stimulation interfaces targeting the peripheral nervous system (PNS). To provide high nerve fiber selectivity, we propose a low-noise (3.67μVrms) low-power (2.24mW) and high-density CMOS microelectrode probe for intra-neural implantation. The probe is composed of two ICs, encapsulated in a biocompatible and hermetic package, each featuring 64 recording and 16 stimulation electrodes. A backend IC digitizes the recorded signals at 31.25kS/s and provides spike detection.