Low-power low-noise versatile amplifier for neural signal recording

We present the design and simulation of the neural recording amplifier in the CMOS 180 nm technology. Amplifier is capable of recording signals from mHz range up to kHz range while rejecting large DC offset generated on the electrode-electrolyte interface. Its band may be control to span over all interesting biopotential signals (low cutoff frequency from 73 mHz to 125 Hz while the upper cutoff frequency from 1.85 kHz to 16.5 kHz). Due to its low input referred noise 4.5 muV (integrated from 1 mHz to 100 kHz), low power consumption 28 muW per one channel, small occupied area 0.094 mm² and small spreads of its main parameters designed amplifier is a good candidate for multichannel neural recording system.