不明白,同样的位置,换其他的比如tlv333就是正向增益
lpv821这个都是衰减
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双电源和单电源供电不是影响传输特性的因素。
单电源供电的局限在于在接近零电位附近的信号很难处理,我们只要保证输入在其共模电压范围之内即可。