Saturday, 30 December 2017

operational amplifier - Op Amp operating conditions


We all know that, there are two assumptions that can be made whe analysing ideal operational amplifers, which are:


V+ = V-



I+ = I- = 0 (no current flows through op amp inputs)


but my question is: "Under what operating conditions are these assumptions valid?"


i am not sure if I'm right, but i said that the input resistor being infinitly big and the output resistor being infinitly close to 0, is this correct?




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