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心电信号发生器解决方案



用dac产生8路0-2v的心电信号,然后经过减法器变换成负的电压,然后衰减200倍最后再滤波输出-+5mv的心电信号。这个方案怎么样?  有什么问题没?

另外dac还要产生直流信号作为极化电压叠加到心电信号上,如何叠加上去?用加法器? 具体怎么设计?

贵公司有没有更好的解决方案??