比例运算电路 l2=11 R4 R2 V=-12R2-(2+12m)R4 4 -I1(R2+R4+R4) =-(R2+R4+R2 R4) OPAMP 设Rl=1M9,R2=200k9,R3=1k9,R4=500k9 Vo=-100.7V10 比例运算电路 ∵ I2 = I1 ∴ 设R1 = 1MΩ, R2 = 200kΩ, R3 = 1kΩ, R4 = 500kΩ Vo = -100.7Vi JP? OPAMP R1 R3 R2 R4 R' Vi Vo