A Light Tolerant Neural Recording IC for Near-Infrared-Powered Free Floating Motes
2021 Symposium on VLSI Circuits(2021)
Abstract
A key challenge for near-infrared (NIR) powered neural recording ICs is to maintain robust operation in the presence of parasitic short circuit current from junction diodes when exposed to light. This is especially so when intentional currents are kept small to reduce power consumption. We present a neural recording IC that is tolerant up to 300 µW/mm
2
light exposure (above tissue limit) and consumes 0.57 µW at 38°C, making it lowest power among standalone motes while incorporating on-chip feature extraction and individual gain control.
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Key words
light tolerant neural recording IC,parasitic short circuit current,near-infrared-powered free floating motes,on-chip feature extraction,gain control,near-infrared powered neural recording ICs,neural signal acquisition,power 0.57 muW,temperature 38.0 degC
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