请问下图加减运算电路的的V.怎么求呢?
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![请问下图加减运算电路的的V.怎么求呢?](/uploads/image/z/9561812-68-2.jpg?t=%E8%AF%B7%E9%97%AE%E4%B8%8B%E5%9B%BE%E5%8A%A0%E5%87%8F%E8%BF%90%E7%AE%97%E7%94%B5%E8%B7%AF%E7%9A%84%E7%9A%84V.%E6%80%8E%E4%B9%88%E6%B1%82%E5%91%A2%3F)
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请问下图加减运算电路的的V.怎么求呢?
请问下图加减运算电路的的V.怎么求呢?
请问下图加减运算电路的的V.怎么求呢?
虚短虚地
u-u+=u-
(u-uo)/RF=u1/R1+u2/R2
u/R5=(u3-u)/R3+(u4-u)/R4
--->uo=(u3/R3+u4/R4)R3R4R5^2/(R3R4+R4R5+R3R5)-(u1/R1+u2/R2)RF