2024/01/09 by Koleibi, Esmaeil Ranjbar, Koua, Konin, Lemaire, William +9
#Biological Physics (physics.bio-ph) #FOS: Biological sciences #FOS: Electrical engineering #FOS: Physical sciences #Neurons and Cognition (q-bio.NC) #Signal Processing (eess.SP) #Systems and Control (eess.SY) #electronic engineering #information engineering
paper · doi:10.48550/arxiv.2406.17779
This paper presents a compact low-power, low-noise bioamplifier for multi-channel electrode arrays, aimed at recording action potentials. The design we put forth attains a notable decrease in both size and power consumption. This is achieved by incorporating an active lowpass filter that doesn't rely on bulky DC-blocking capacitors, and by utilizing the TSMC 28 nm HPC CMOS technology. This paper presents extensive simulation results of noise and results from measured performance. With a mid-band gain of 58 dB, a -3 dB bandwidth of 7 kHz (from 150 Hz to 7.1 kHz), and an input-referred noise of 15.8 μV\rm rms corresponding to a NEF of 12. The implemented design achieves a favourable trade-off between noise, area, and power consumption, surpassing previous findings in terms of size and power. The amplifier occupies the smallest area of 2500 μm2 and consumes only 3.4 μW from a 1.2 V power supply corresponding to a power efficiency factor of 175 and an area efficiency factor of 0.43, respectively.