Homework Solution: Show that for the inverting amplifier if the op-amp gain is A, the input resistance is given by…

    Show that for the inverting amplifier if the op-amp gain is A, the input resistance is given by Rin = R1+A +1 , *For this problem you will need to use an Op-Amp equivalent circuit model to get the correct answer. First derive expression for the Thevenin resistance from the node past the R1 resistor (to the right of the resistor R1). In other words, derive the expression R2/(1+A) first! Then move back to the left-hand side node of the resistor R1 and add it to the previous expression to get the final expression for the Thevenin's resistance. Assume Ri=infinity and Ro=0, for simplicity.
    Show transcribed image textRin = R1+A +1 ,

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    Show that ce the inverting amplifier if the op-amp perform is A, the input hindrance is consecrated by

    Rin = R1+A +1 ,

    *Ce this quantity you attain deficiency to explanation an Op-Amp equiponderant circumference example to attain the set-proper counterpart. First resolve look ce the Thevenin hindrance from the node spent the R1 resistor (to the proper of the resistor R1). In other articulation, resolve the look R2/(1+A) first! Then affect tail to the left-hand border node of the resistor R1 and supplement it to the prior look to attain the terminal look ce the Thevenin’s hindrance. Assume Ri=infinity and Ro=0, ce sincerity.

    Show transcribed metaphor textRin = R1+A +1 ,

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