negative feedback

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negative feedback

[′neg·əd·iv ′fēd‚bak]
(control systems)
Feedback in which a portion of the output of a circuit, device, or machine is fed back 180° out of phase with the input signal, resulting in a decrease of amplification so as to stabilize the amplification with respect to time or frequency, and a reduction in distortion and noise. Also known as inverse feedback; reverse feedback; stabilized feedback.
(science and technology)
Feedback which tends to reduce the output in a system.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

negative feedback

see SYSTEMS THEORY.
Collins Dictionary of Sociology, 3rd ed. © HarperCollins Publishers 2000
References in periodicals archive ?
(one central negative feedback loop plus one additional feedback loop of components X, S, Y, and Z, where regulations among components X, S, and Y are ?activation [right arrow] + repression H?) to denote these coupled negative feedback loops:
Now, however, there are two negative feedback loops at work, falling nickel prices both deterring stainless buyers and cutting costs at marginal producers.
The results provide insights to possible contagion risks through cross-border negative feedback loops between sovereigns and banking sectors in Europe that help explain the severe impact of the crisis.
Fourth, there has been an enthusiastic "discovery" of positive feedback loops (e.g., Knapp and Urry) while negative feedback loops have been neglected.
Negative feedback loops with MDM2 and ATM can explain p53's oscillation behavior after DNA damage, Galit Lahav of the systems biology department at Harvard Medical School in Boston and his colleagues reported in the May 9 issue of Molecular Cell.
The credit crisis stemming from the US housing slump has triggered a 'negative feedback loop' in the global economy that poses risks for growth, the International Monetary Fund said yesterday.
The American Medical Association called the Medicare Physician Payment Reform Bill and Quality Improvement Act of 2006 an "important step toward replacing the flawed Medicare physician payment formula." The legislation would change formulas to end the "negative feedback loop that constantly creates a deficit in healthcare funding," Rep.
A PLL is a negative feedback loop that controls its output by comparing the phase of a feedback signal from the output to that of a reference signal: it is an indirect form of a synthesizer.
A pathway from the cerebral cortex to the basal ganglia and back to the cerebral cortex, acting as a negative feedback loop to the cerebral cortex.
Over time, as its leaders competed to titillate their consuming constituency, Roman culture increasingly displayed symptoms of the same kind of spiralling negative feedback loop that our global cultural-industrial complex is clearly evincing now.
The problems are usually due to an increase in the shunt negative feedback loop impedance when the "[C.sub.f]" DC blocking capacitor reactance forming the [R.sub.f], [L.sub.f], [C.sub.f] shunt loop in Figure 4 increases.
The danger now is that a negative feedback loop between economies and markets will take hold.