A Low-Power Low-Noise Biopotential Amplifier in 28 nm CMOS

Abstract

This paper presents a compact low-power, lownoise 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 rms corresponding to a NEF of 12. The implemented design achieves a favourable tradeoff between noise, area, and power consumption, surpassing previous findings in terms of size and power. The amplifier occupies the smallest area of 2500 µm 2 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.

Low-Noise, Low-Power Readout IC for Two-Electrode ECG Recording Using Common-Mode Charge Pump for Robust 20-VPP Common-Mode Interference

“…When the CMCP is enabled, the CMI is reduced by the CMCP operation and the CFIA output clearly shows the P-Q-R-S-T complex. Table 1 summarizes the performance of the proposed readout IC for ECG recording using the CMCP [4,5,8,11,30,31]. The proposed readout circuit has low power consumption and low noise characteristics.…”

“…In addition, the 20-VPP CMI tolerance characteristics can be verified. Table 1 summarizes the performance of the proposed readout IC for ECG recording using the CMCP [4,5,8,11,30,31]. The proposed readout circuit has low power consumption and low noise characteristics.…”