Design of CMOS Analog Front-End Electroencephalography (EEG) Amplifier with ±1-V Common-mode and ±10-mV Differential-mode Artifact Removal

Chi Wei Huang, Jian Jun Wang, Chung Chih Hung, Chung-Yu Wu

研究成果: Conference contribution同行評審

2 引文 斯高帕斯(Scopus)

摘要

This paper presents an analog front-end amplifier (AFEA), applied to Electroencephalography (EEG) recording, ready to directly drive the capacitor array of the following SAR ADC. In order to achieve lower noise, a capacitively-coupled chopper instrumentation amplifier (CCCIA) with chopper modulation is used in the AFEA to suppress flicker noise within the bandwidth. To avoid the stimulation artifact from saturating the amplifier, the artifact cancellation loop is employed. Additionally, the digital control for artifact cancellation loop enables the AFEA fast recover to normal operation after stimulation so that the AFEA can measure EEG signals right after stimulation. The EEG AFEA was fabricated in TSMC 0.18μm CMOS technology. From measurement results, the high-pass corner of the EEG AFEA is obtained at 0.341 Hz and the low-pass corner at 113 Hz. The EEG AFEA has the tunable gains of 60.4/69.6/79.2 dB. The input referred noise within the bandwidth is 0.839 μVrms. The measured THD is 0.155% under no artifact and 4.5% with 150-mV DC offset, ±1-V common-mode artifact (CMA), and ±10-mV differential-mode artifact (DMA) under 2-kHz and 2.01-kHz of temporally interfering stimulation (TIS). Additionally, the area and power consumption are 2.576 mm2 and 83.2 μW, respectively.

原文English
主出版物標題BioCAS 2022 - IEEE Biomedical Circuits and Systems Conference
主出版物子標題Intelligent Biomedical Systems for a Better Future, Proceedings
發行者Institute of Electrical and Electronics Engineers Inc.
頁面714-717
頁數4
ISBN(電子)9781665469173
DOIs
出版狀態Published - 2022
事件2022 IEEE Biomedical Circuits and Systems Conference, BioCAS 2022 - Taipei, Taiwan
持續時間: 13 10月 202215 10月 2022

出版系列

名字BioCAS 2022 - IEEE Biomedical Circuits and Systems Conference: Intelligent Biomedical Systems for a Better Future, Proceedings

Conference

Conference2022 IEEE Biomedical Circuits and Systems Conference, BioCAS 2022
國家/地區Taiwan
城市Taipei
期間13/10/2215/10/22

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