A 32-ch. bidirectional neural/EMG interface with on-chip spike detection for sensorimotor feedback.

This paper presents a novel 32-channel bidirectional neural interface, capable of high voltage stimulation and low-power, low-noise neural recording. Current-controlled biphasic pulses are output with a voltage compliance of 9.25V, userconfigurable amplitude (max. 315 mu A) & phase duration (max. 2 ms). The low-voltage recording amplifiers consume 23 mu W per channel with programmable gain between 225-4725. Signals are 10-bit sampled at 16 kHz. Data rates are reduced by granular control of active recording channels, spike detection and eventdriven communication, and repeatable multi-pulse stimulation configurations.