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Difference Between Positive and Negative Feedback

 

Comparison Chart

Basis for ComparisonPositive FeedbackNegative Feedback
Also called asRegenerative feedbackDegenerative feedback
The relation between input and outputIn phaseOut of phase
Overall gainGreater than the gain of the system where feedback is not present.Smaller than the gain of the system where feedback is absent.
Effective inputSum of applied input and fed-back signal.The difference between applied input and the fed-back signal
The transfer function of the system with respective feedbackgain in case of positive feedbackgain in case of negative feedback
StabilityLessComparatively more
Phase shift0° or 360°180°
Feedback is taken fromNon-inverting terminal of the op-ampInverting Terminal of op-amp
SensitivityLowHigh
UseIn oscillators.In amplifiers.



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