Advantages of NEGATIVE FEEDBACK over POSITIVE FEEDBACK

There are numerous advantages for Negative Feedback Amplifier over Positive Feedback Amplifiers.
And having only one advantage for positive feedback,
The amplifier with positive feedback increases the overall gain. While the negative feedback amplifier reduces gain considerably.

ADVANTAGES OF NEGATIVE FEEDBACK AMPLIFIER

1. GAIN STABILITY
The negative feedback amplifier increases the Gain Stability.
ie; The gain will be stable over external or internal variations.

2. NOISE REDUCTION
It is impossible to construct an Amplifier without NOISE. By using Negative Feedback amplifier we can reduce the Noise.

3. REDUCTION IN NONLINEAR DISTORTION
By the increase in number of amplifier stages, nonlinear distortion also increases gradually.

4. BANDWIDTH CAN BE INCREASED
Negative feedback amplifier decreases the voltage gain, the reduction in voltage gain results improved frequency bandwidth.

5. INCREASE IN INPUT IMPEDENCE
The amplifier with negative feedback increases the input impedence. Thus we can avoid loading of signal source.

6. DECREASE IN OUTPUT IMPEDENCE
The amplifier with negative feedback reduces the output impedence.