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给VCA824输入一个直流偏置电压为3V交流Vpp为300mv的信号，Rg=Rf=200欧，设置Vg电压为0.5V，为什么输出信号只有一个直流偏置电压为2.5v没有交流信号？
您是否是单电源供电？建议采用双电源供电。
采用的是双电源供电
