Regenerative Feedback

Regenerative feedback, also known as positive feedback, is a term used in control systems and amplifiers. It refers to a feedback mechanism in which a portion of the output signal is fed back to the input with the same polarity, resulting in an amplification or reinforcement of the input signal. This feedback loop can have both beneficial and detrimental effects depending on the system.

Positive Feedback

Positive feedback, as the name suggests, increases or reinforces the input signal. It can lead to instability and oscillation if not properly controlled. However, it is also useful in certain applications where amplification or regeneration is desired.

Negative Feedback

On the other hand, negative feedback is the opposite of positive feedback. It reduces or attenuates the input signal. Negative feedback is commonly used in control systems to improve stability, linearity, and reduce distortion. It helps to maintain the desired output by comparing it with the reference input and making necessary adjustments.

Regenerative Feedback vs Negative Feedback

While regenerative feedback and negative feedback have opposite effects on the input signal, they are not the same. The main difference lies in the polarity of the feedback signal. In regenerative feedback, the feedback signal is in phase with the input signal, resulting in amplification. In negative feedback, the feedback signal is out of phase with the input signal, leading to attenuation.

Correct Answer

In the given options, the correct answer is option B, positive feedback. Regenerative feedback is another term for positive feedback. It amplifies the input signal by feeding a portion of the output signal back to the input with the same polarity.

Conclusion

Regenerative feedback, also known as positive feedback, amplifies the input signal by feeding a portion of the output signal back to the input with the same polarity. It is the opposite of negative feedback, which attenuates the input signal. Positive feedback can be beneficial in certain applications but can also lead to instability if not properly controlled.