DescriptionSet-point version of negative feedback amplifier.png
English: Block diagram for negative feedback amplifier using the desired output signal that is provided as a set-point value Ô by block S and the feedback provided as an attenuated output βO by the block E that monitors the state of the amplifier. The amplifier gain A is changed by the disturbance D to a new value A′, and provided the gain is large the output is Ô/β regardless of any alteration in gain caused by D.
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