← 返回 JSSC 论文列表JSSC 2014第9期Power Management0.18 µm CMOSBiosignal
A Wearable 8-Channel Active-Electrode EEGETI Acquisition System for Body Area Ne
一种可穿戴的8通道无凝胶EEG/电极-组织阻抗采集系统，具有高输入阻抗和低噪声特性。
1.2 GΩ输入阻抗（20 Hz时），1.75 µVrms输入参考噪声（0.5–100 Hz），84 dB CMRR，±250 mV电极偏移抑制能力
可穿戴EEG采集电极-组织阻抗主动电极低噪声
▸采用主动电极（AEs）放大弱EEG信号
▸共模前馈（CMFF）方案提高CMRR 25 dB
▸单线PWM协议配置后端（BE）
Abstract
This paper describes an 8-channel gel-free EEG/elec-
trode-tissue impedance (ETI ) acquisition system, cons isting of
nine active electrodes (AEs) and one back-end (BE) analog signal
processor. The AEs amplify the weak EEG signals, while their
low output impedance suppresses cable-motion a rtifacts and
50/60 Hz mains interference. A common-mode feed-forward
(CMFF) scheme boosts the CMRR of the AE pairs by 25 dB.
The BE post-processes and digitizes the anal og outputs of the
AEs, it also can con