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Design of a gel-less two-electrode ECG monitor

机译:无凝胶两电极心电监护仪的设计

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摘要

In this paper, an ECG amplifier design, specifically to interface two gel-less electrodes for low-power portable applications, is presented. The goal is to develop a circuit with performance sufficient to extract heart rate information reliably using digital signal processing techniques, when measuring a subject engaging in moderate physical activity (such as walking). This application, having no reference electrode, requires biasing of the input to avoid amplifier saturation, all the while maintaining a sufficiently high common-mode noise rejection. A baseline correction circuit and an isolated circuit ground are included in the proposed design to handle changes in DC voltage drift due to electrode movement as well as to minimize commonmode noise from mains.
机译:在本文中,提出了一种ECG放大器设计,专门用于在低功率便携式应用中连接两个无胶电极。目的是开发一种电路,该电路具有足够的性能,可以在测量进行中等体育活动(例如步行)的对象时使用数字信号处理技术可靠地提取心率信息。这种没有参考电极的应用要求输入偏置以避免放大器饱和,同时始终保持足够高的共模噪声抑制能力。提议的设计中包括基线校正电路和隔离的电路接地,以处理由于电极移动而引起的直流电压漂移的变化,并使来自电源的共模噪声降至最低。

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