按照图接法,后面跟0.5~100Hz的贝塞尔带通滤波器,加入15V的共模信号,测INA128共模抑制比波形失真,上部分波形被截去一部分,这是为什么?
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供电电压为15V,共模输入电压很小也会失真,但是,单独测试INA128没有失真,只是接在电路中就会失真,后面接的是0.05HZ的高通滤波器,放大差模信号很正常