Question

What is more critical for reducing the gain distribution of an operational amplifier and why is that so? Operational amplifier selection or resistor selection?

Answer 1

the ideal of amp should it ever exist, would gain infinite have ao infut impedance -zero outfaut However when impedance. selecting the right opamp there is a balance to be made between General purpose the different of ampe ones will perform adequately is. most areas, wheras some others may very high have a right input impedance , or wide low noise on frequency response. Menerally speaking the choice of resistance is more critical for gain distrilection, considering the speetfic case of ating apamp circuit a more critical points need to be observed. The inverting amp unlike the non inverting opamp leased amp is not a trum voltage amp, since its input impedance is not infinite but is given by Rl it also the input impedance of amp As a consequence, the value of that you choosese for Rg is also the input inpedance of amp. if you expect that the ciscuit behaves like an inverting voltage amplifier this input impedance it tot infinite needs to be significantly larger than the the resistance of internal the providing source effect infurt input could loading signal. Otherwise be relevant