Why feedback is required in oscillators?

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Description : What are oscillators in technical analysis?

Description : What is meant by feedback in electronics?

Description : advantages and disadvantages of feedback(block diagram)?

Description : A feedback amplifier has a gain of 1000 without feedback. Find the gain with feedback and the amount of feedback in dB for a negative feedback of 10%. 

Description : Compare positive and negative feedback.

Answer : 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 ... impedance increases decreases 9 Uses Oscillators, Schmitt trigger Amplifiers, bootstrapping