I apologize for the extremely basic question, but I want to be sure.
Ideally, an amplifier should have a linear output power to input power relationship. However, in most amplifiers (say a class AB amplifier) this relationship can break down at points. Am I correct in saying that as you go to higher input power, the slope of the output/input function decreases rather than increases?
In other words, if we consider the two graphs below,
does a typical amplifier act more like the blue curve or the red curve?