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本文介绍的输入阻抗升高电路原理如附图所示。该电路由TLC272(IC)等组成。输入阻抗计算公式:Rin=R+1[(R2+R3)/R3] 根据附图中R1～R3的阻值,可计算出该电路输入阻抗为10~9Ω。
This article describes the principle of the input impedance of the circuit shown in the attached figure. The circuit consists of TLC272 (IC) and other components. Input impedance calculation formula: Rin = R + 1 [(R2 + R3) / R3] According to the resistance of R1 ~ R3 in the picture, it can be calculated that the input impedance of this circuit is 10 ~ 9Ω.