A low noise, non-contact capacitive cardiac sensor.
A low noise, non-contact capacitive cardiac sensor.
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一种低噪声、非接触式电容式心脏传感器。
DOI：
10.1109/embc.2012.6347114
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
Bocko,MarkF
中科院分区：
文献类型：
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作者：
Peng,GuoChen;Bocko,MarkF
开发灵敏的、非接触式的电场传感器来测量微弱的生物电信号，将有助于开发一些不显眼的健康传感器。在这篇文章中，我们总结了我们最近在非接触式心电传感器发展中的一些具体挑战方面的工作。首先，我们考虑了低噪声传感器前置放大器的设计。我们采用了包含双反馈回路的电路设计，以消除输入晶体管泄漏电流，同时提供稳定的操作、快速的建立时间和良好的低频响应，而不需要超高值电阻。该前置放大器在0.0 5~10 0 Hz频段的输入参考噪声为0.76μVrms，比现有心电前置放大器的输入参考噪声低好几倍。
The development of sensitive, non-contact electric field sensors to measure weak bioelectric signals will be useful for the development of a number of unobtrusive health sensors. In this paper we summarize our recent work on a number of specific challenges in the development of non-contact ECG sensors. First, we considered the design of a low noise sensor preamplifier. We have adapted circuit designs that incorporate a double feedback loop to cancel the input transistor leakage current while providing stable operation, fast settling time and good low frequency response without the need for ultrahigh value resistors. The measured input referred noise of the preamplifier in the frequency band 0.05-100 Hz is 0.76 μVrms, which is several times lower than existing ECG preamplifiers.