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如果使用呼吸功能，会减少一路胸导，这样不合理啊。如果不减少胸导，自己再找一路单独AD？
有什么其他方案，需要保证12导联心电系统。
如果信号通道数不匹配设计要求.
可以看看 http://www.ti.com.cn/lsds/ti_zh/data-converters/medical-analog-front-end-products.page
寻找更合适的器件
