Question

What do you mean by feedback? discuss the principles of negative feedback in amplifiers?

Answer 1

feedback process a part of output is sampled and fed back to the input.The fed back signal can be in phase with or out of phase with the original input signal..feedback is  defined as the process in which a part of output signal (voltage or current) is returned back to the input
 negative-feedback amplifier(or feedback amplifier) is an electronic amplifier that subtracts a fraction of its output from its input, so that negative feedback opposes the original signal. ... a summing circuit that acts as a subtractor (the circle in the figure), which combines the input and the transformed output.

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