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A 46 µW 133-VPP Common-Mode Interference-Tolerant Biopotential Amplifier for Two-
一种针对两电极系统的生物电位放大器，能耐受130Vpp共模干扰并仅消耗46µW。
110nm CMOS, 1-1.5V供电, 4.6µW/通道, 130Vpp CMI耐受
生物电位放大器共模干扰抑制Miller效应电流复用OTA低功耗
▸利用Miller效应实现低共模输入阻抗的CMI-Follower
▸采用噪声高效的CMA-CR-OTA扩展输入共模范围
▸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 (