Negative Feedback

Negative feedback is inhibition, of a process, initiated by a product or outcome of that process. Negative feedback tends to make a system self-regulating; it can produce stability and reduce the effect of fluctuations. Negative feedback loops where just the right amount of correction is applied in the most timely manner can be very stable, accurate, and responsive. Negative feedback is widely used in mechanical and electronic engineering, but it also occurs naturally within living organisms, and can be seen in many other fields from chemistry and economics to social behaviour and the climate.

In some systems controlled by a negative feedback loop, the level of some measured parameter is compared to a reference value, and any difference triggers an action that reduces the gap between the two levels.

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Other articles related to "negative feedback, feedback, negative":

Current-to-voltage Converter - The Basic Idea Behind The Passive Version - Passive Version Applications - I-to-V Converter As A Part of Negative Feedback V-to-I Converters
... Negative feedback systems have the unique property to reverse the causality in the electronic converters connected in the feedback loop ... current source) built by using a negative feedback is actually a reversed current-to-voltage converter ... where a current-to-voltage converter (the bare resistor R) is connected in the negative feedback loop ...
Song Audio - Research and Development - Pre/Power & Integrated Amplifiers
... preamplifier (SA-1) with separate power supply and single-ended triode zero negative feedback 300B output monoblock power amplifier (SA-300MB), the Company's primary contribution to the typology of ... one of the first in absolute purist design consisting of single-ended triode operation with zero negative feedback utilising the EL34 output vacuum ...
Step Response of Feedback Amplifiers - Analysis
... A negative feedback amplifier has gain given by (see negative feedback amplifier) where AOL = open-loop gain, AFB = closed-loop gain (the gain with negative feedback ... enough values of βA0 the square root becomes the square root of a negative number, that is the square root becomes imaginary, and the pole positions are complex conjugate ... the frequency of oscillation is set by μ, that is, by the feedback parameter through βA0 ...
Tube Sound - Design Comparison - Negative Feedback
... Tube amplifiers could not use as much negative feedback (NFB) as transistor amplifiers due to the large phase shifts caused by the output transformers and their lower stage gains ... Since transient intermodulation distortion was mainly caused by negative feedback, tube sound never suffered much of that kind of distortion ...
Negative Feedback - Use - Electronic Amplifiers
... The negative feedback amplifier was invented by Harold Stephen Black at Bell Laboratories in 1927, and patented by him in 1934 ... Negative feedback corrects this by trading unused gain for higher linearity (lower distortion) ... frequency range, will additionally produce too large a feedback signal in that same range ...

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