Compare positive and negative feedback.
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Sr. No.
Parameter
Positive feedback 
Negative feedback
1 BW
Increases
Decreases
2 Feedback signal
In phase with the input signal.
180 º out of phase with the input signal.
3 Net input signal
Increases
Decreases
4 Gain
Increases
Decreases
5 Noise
Increases
Decreases
6 Stability
Poor
Improved
7 Input impedance
decreases
increases
8 Output impedance
increases
decreases
9 Uses
Oscillators, Schmitt trigger
Amplifiers, bootstrapping
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