It is fundamental to master the inverting and non-inverting configurations.
Indeed, they are at the basis of the most op-amp structures: adder and subtractor (that we will cover further), but also integrator, derivator, filter. …
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On order to recognize them :
 Ve applied to the input + : non inverting configuration.
Ve applied to the input – : inverting configuration.
|
Configuration |
Inverting |
Non-inverting |
Ve and Vs |
Opposite signs |
Same signs |
|
<, = ou > 1 |
≥ 1 |
Re (=R input) |
Ve/I1 = R1 |
Ve/I- = ∞ |
Rs (=R output) |
0 |
0 |
