一道模拟电子技术基础题

fanzzu网友说得差不多,但问题没那么简单。让俺试一下：U+=(R3UI4+R4UI3)/(R3+R4)U-=U+i1=(UI1-U+)/R1i2=(UI2-U+)/R2if=i1+i2=(UI1-U+)/R1+(UI2-U+)/R2Uo=U+-R5ifUo=U++(U+-UI1)R5/R1+(U+-UI2)R5/R2Uo=(1+R5/R1+R5/R2)U+-R5/R1UI1-R5/R2UI2Uo=(1+R5/R1+R5/R2)(R3UI4+R4UI3)/(R3+R4)-R5/R1UI1-R5/R2UI2 代入电阻数据可得Uo=(1+200/10+200/10)(50UI4+100UI3)/(50+100)-200/10UI1-200/10UI2Uo=41(UI4+2UI3)/3-20UI1-20UI2Uo=13。667UI4+27。333UI3-20UI1-20UI2具体原理比较复杂,推荐侠云网友参考元增民《模拟电子技术》第8。1节。水平所限,如有谬误请各位大侠指正。