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我准备用两块LMH6518级联，但在第二级时不知道第二级的差分负输入该直接接地还是要串联个50Ω的电阻再接地？
还有一个问题，我的LMH6518在前级把单端信号偏置提升了2V，后来在Vcm中由提升2V，那输出结果是提升2V还是提升了4V？Vcm会不会与前面的偏置电压叠加？
级把单端信号偏置提升了2V，后来在Vcm中由提升2V，那输出结果是提升2V还是提升了4V？Vcm会不会与前面的偏置电压叠加？