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LMV358单电源工作时,放大倍数在800-1000,外部加偏置的问题请教



需放大的信号源是电化学传感器,考虑有负信号的原因,加了外部电压偏置。是在同相端加好呢,还是反相端加好?放大800-1000倍,两级放大,有没有什么地方需要特别注意的地方呢?