本文主要介绍了心电信号的放大，滤波等。

This paper introduces ECG amplification, filtering and so on.

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因此，有必要采用空间滤波等手段，对输入数据进行预处理。

Therefore, such tools as spatial filtering etc. are essential to perform preprocessing of the input data.

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在电路板的设计中采用光电耦合器件、铁氧体磁珠、旁路电容滤波等方式减小了噪声。

At last of design, use optocoupler device, ferrite beads and bypass capacitor to reduce system noise.

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