A TDMA Neural Recording SoC With IIR-RLS Adaptive Filters for 83.4 dB Artifact Suppression Across 256 Channels

Abstract

This article introduces a digitally-assisted, multi- electrode neural recording system equipped with a multi-channel stimulation artifact canceller (SAC) module. The system employs a 16-electrode time division multiple access (TDMA) scheme, allowing multiplexed neural signals to be recorded through a single shared analog front end (AFE). Simultaneously, it cancels stimulation artifacts from 16 stimulation electrodes using an infinite impulse response (IIR) recursive least squares (RLS) adaptive