IEEE Trans Biomed Circuits Syst. 2019 Feb;13(1):103-111. doi: 10.1109/TBCAS.2018.2876240. Epub 2018 Oct 15.
This paper presents the experimental validation of a readout circuit for the acquisition, amplification, and transmission of extremely weak biopotentials with a focus on electroencephalography (EEG) signals. The device, dubbed CochlEEG, benefits from a low-power design for long-term power autonomy and provides configurable gain and sampling rates to suit the needs of various EEG applications. CochlEEG features high sampling rates, up to 4 kHz, low-noise signal acquisitions, support for active electrodes, and a potential for Wi-Fi data transmission. Moreover, it is lightweight, pocket size, and affordable, which makes CochlEEG suitable for wearable and real-world applications. The efficiency of CochlEEG in EEG data acquisition is also investigated in this paper. Auditory steady-state responses acquisition results validate CochlEEG's capability in recording EEG with a signal quality comparable to commercial mobile or research EEG acquisition devices. Moreover, the results of an oddball paradigm experiment prove the capability of CochlEEG in recording event-related potentials and demonstrate its potential for brain-computer interface applications and electrophysiological research applications requiring higher temporal resolution.
本文介绍了一种用于获取、放大和传输极弱生物电势的读出电路的实验验证，重点是脑电图（EEG）信号。该设备名为 CochlEEG，具有低功耗设计，可实现长期自主供电，并提供可配置的增益和采样率，以满足各种 EEG 应用的需求。CochlEEG 具有高采样率（高达 4 kHz）、低噪声信号采集、支持有源电极以及潜在的 Wi-Fi 数据传输功能。此外，它重量轻、体积小、价格实惠，非常适合可穿戴和现实世界的应用。本文还研究了 CochlEEG 在 EEG 数据采集方面的效率。听觉稳态响应采集结果验证了 CochlEEG 在记录 EEG 方面的能力，其信号质量可与商用移动或研究 EEG 采集设备相媲美。此外，一项奇特范式实验的结果证明了 CochlEEG 记录事件相关电位的能力，并展示了其在脑机接口应用和需要更高时间分辨率的电生理研究应用中的潜力。
