Input and output impedance of a circuit

Discussion in 'General Electronics Chat' started by Luca Capizzi, Oct 14, 2016.

  1. Luca Capizzi

    Thread Starter New Member

    Oct 14, 2016
    [​IMG] <= I use this model for a (pseudo) real opamp.
    [​IMG] What is the definition of "Input/output impedance" for this circuit? I mean, I suppose that for the input i could consider V_in/I_in . And what about the output resistance? Which currents I have to consider? Moreover, if I connect a load R_L to V_out what does it changes for this quantities defined above?