达到如下四个指标
1、增益40dB,直流输入时,增益误差不大于0.1dB。
2、输入0V时,输出电压漂移不大于10mV。
3、输入阻抗>100k。
4、放大带宽: DC~不低于50kHz。
选择哪一款放大器比较适合
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