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对集成运放组成的负反馈电路进行了研究，提出利用电路的电压放大倍数的表达式来计算电路的输出电阻的方法．该方法同时也可推广到其他类型的放大电路中应用
The negative feedback circuit composed of integrated operational amplifier is studied, and a method of calculating the output resistance of the circuit by using the expression of the voltage magnification of the circuit is proposed. This method can also be extended to other types of amplifier applications