What is Negative feedback?

Returning part of the output to the input with opposite polarity. Gain drops, but it becomes stable, and distortion and bandwidth improve.

Negative feedback in the explanations

Negative feedback subtracts part of the output from the input, reducing gain.
What is the effect of applying negative feedback to an ampl…
When an op-amp with huge open-loop gain A has negative feedback, the output settles at a finite value, so the voltage between its inputs is Vout/A—essentially zero.
In an ideal op-amp circuit with negative feedback, what is …
An emitter resistor creates negative feedback: if collector current rises, the emitter voltage rises, VBE falls and the increase is checked.
What is the main reason for using a current-feedback bias c…