NFB is an acronym for negative feedback.
Lets say that we have an amplifier with three stages: input (differential) stage followed by voltage amplification stage and output power stage. And we have a NFB from output of the power stage back to the differential input stage of the amplifier.
Will the open-loop gain of an amplifier decrease as the portion of global NFB is increased?
Referring to the lower graph: With 100dB of gain, the amplifier has roll-off point of frequency at 500 Hz. If we would decrease the gain of the same amplifier, would we also increase the roll-off point of frequency to about 10k Hz (as marked with green line)?