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帮我看看原理图以及计算和数值是否正确，谢谢！
公式里Vout=4N*Vin的4倍是什么意思？我理解的没有这个4倍呢。
因为（N1+N2):(N3+N4)=1.3:1,那么Vout/Vin=1/1.3. Vin=5V 的话，Vout=5/1.3.我是这样理解的。
