FEEDBACK
\fˈiːdbak], \fˈiːdbak], \f_ˈiː_d_b_a_k]\
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A mechanism of communication within a system in that the input signal generates an output response which returns to influence the continued activity or productivity of that system.
By DataStellar Co., Ltd
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How an output is retruned to the next step. It helps regulate machines and is part of all interactions no matter how much. It involves the reaction to the stimulus. Refer to homeostasis.
By Henry Campbell Black
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Part of a system output presented at its input.Feedback may be unintended. When used as a design feature,the output is usually transformed by passive components whichattenuate it in some manner; the result is then presented atthe system input.Feedback is positive or negative, depending on the sign withwhich a positive change in the original input reappears aftertransformation. Negative feedback was invented by Black tostabilise vacuum tube amplifiers. The behaviour becomeslargely a function of the feedback transformation and onlyminimally a function of factors such as transistor gain whichare imperfectly known.Positive feedback can lead to instability; it finds wideapplication in the construction of oscillators.Feedback can be used to control a system, as in feedbackcontrol.
By Denis Howe
