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A 46 µW 133-VPP Common-Mode Interference-Tolerant Biopotential Amplifier for Two-
一种耐受130VPP共模干扰的双电极生物电位放大器
110nm CMOS, 1-1.5V供电, 4.6µW/通道, 130VPP共模耐受
生物电位放大器共模干扰抑制米勒效应电流复用OTACMOS
▸利用米勒效应实现低共模输入阻抗
▸采用噪声高效的共模自适应电流复用OTA
▸无需高功耗技术即可实现高共模抑制比
Abstract
This article presents a biopotential recording ana-
log front-end (AFE) specifically tailored for a two-electrode
measurement system, capable of capturing small biopotential
signals while tolerating a large common-mode interference (CMI)
over 130 V PP. By leveraging the Miller e ffect, the proposed
CMI-Follower provides a significantly low common-mode input
impedance ( ZIN-CM-C), achieving large CMI tolerance without
additional noise contribution. The low ZIN-CM-C enables the
isolated chip-ground (