I have a pretty solid grasp of electronic theory but for some reason op amps are confusing the ever living *frick* out of me.
Edit:. Thanks to those of you trying to dumb it down for me! I have an electronics tech assessment with Garmin on Thursday, and though I’ve worked on electronics for 14 years, including 9 in the military, those 9 years were in the Marines. I understand things better when they’re sketched with crayons 🙂
In: Engineering
do you mean internally or externally ?
Externally: the simest model is, the output voltage Uout = G* (Uplus – Uminus), where G is really large.
Since G is very large, may even depend on temperature and such, it is not so useful on its own. The Opamp becomes very useful if you clamp the output back into the input, forcing additional relations between Uout and one (or both) of the inputs.
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