Negative Feedback is the process of feeding of a small amount of an amplifier's output back to its input out of phase, the purpose is to cancel out some of the distortion (notably even harmonics) the amplifier may introduce.

Answered by Shobhit , an ibibo Master, at 6:04 PM on May 09, 2008

Negative Feedback is the process of feeding of a small amount of an amplifier's output back to its input out of phase, the purpose is to cancel out some of the distortion (notably even harmonics) the amplifier may introduce.

Answered by Ashish Yadav , an ibibo Wizard, at 7:17 PM on May 08, 2008

the feeding of a small amount of amplifier's output back to its input out of phase,the purpose is to cancel out some of the distortion(notably even harmonics)the amplifier may introduce.

Answered by aliasgar , an ibibo Master, at 7:58 AM on May 05, 2008

to cancel out some of the distortion that the amplifier may introduce, a small amount of an amplifier's output is fed back to its input out of phase.this is called negative feedback

Answered by a banerji , an ibibo Master, at 1:09 AM on May 04, 2008

Negative feedback feeds part of a system's output, inverted, into the system's input; generally with the result that fluctuations are attenuated. Many real-world systems have one or several points around which the system gravitates. In response to a perturbation, a negative feedback system with such point(s) will tend to re-establish equilibrium.
In many physical and biological systems, qualitatively different influences can oppose each other. For example, in biochemistry, one set of chemicals drives the system in a given direction, whereas another set of chemicals drives it in an opposing direction. If one, or both of these opposing influences are non-linear, an equilibrium point(s) results.
In Biology, this process (generally biochemical) is often referred to as Homeostasis; whereas in Mechanics, the more common term is equilibrium.
In Engineering, Mathematics and the Physical and Biological Sciences, common terms for the points around which the system gravitates include: attractors, stable states, eigenstates/eigenfunctions, equilibrium points, and setpoints.
Negative feedback feeds part of a system's output, inverted, into the system's input; generally with the result that fluctuations are attenuated. Many real-world systems have one or several points around which the system gravitates. In response to a perturbation, a negative feedback system with such point(s) will tend to re-establish equilibrium.
In many physical and biological systems, qualitatively different influences can oppose each other. For example, in biochemistry, one set of chemicals drives the system in a given direction, whereas another set of chemicals drives it in an opposing direction. If one, or both of these opposing influences are non-linear, an equilibrium point(s) results.
In Biology, this process (generally biochemical) is often referred to as Homeostasis; whereas in Mechanics, the more common term is equilibrium.
In Engineering, Mathematics and the Physical and Biological Sciences, common terms for the points around which the system gravitates include: attractors, stable states, eigenstates/eigenfunctions, equilibrium points, and setpoints.
'Negative' refers to the sign of the multiplier in mathematical models for feedback. In delta notation, -Δoutput is added to or mixed into the input. In multivariate systems, vectors help to illustrate how several influences can both partially compliment and partially oppose each other.
'Negative' refers to the sign of the multiplier in mathematical models for feedback. In delta notation, -Δoutput is added to or mixed into the input. In multivariate systems, vectors help to illustrate how several influences can both partially compliment and partially oppose each other.

Answered by jaivir , an ibibo Master, at 6:49 PM on May 01, 2008

well kajol, A control mechanism where a change in a variable (eg population increase) sets off a response that counteracts the initial change. In a system, the mechanism by which a process is limited internally-that is, without reference to factors outside the system.A mechanism in the body for maintaining a state of internal constancy, or homeostasis; effectors are activated by changes in the internal environment, and the actions of the effectors serve to counteract these changes and maintain a state of balance.

Answered by satyaiitk , an ibibo Master, at 4:20 PM on May 01, 2008

An interaction that reduces or dampens the response of the system in which it is incorporated.

Answered by Manju Jain , an ibibo Citizen, at 10:07 PM on April 30, 2008

A process that results in a reduction in the response of a system to an external influence.

Answered by ruchi arora , an ibibo Advisor, at 10:02 PM on April 30, 2008

Negative feedback feeds part of a system's output, inverted, into the system's input; generally with the result that fluctuations are attenuatedNegative feedback is a commonly misunderstood subject. Global negative feedback refers to the "feeding back" of a small amount of signal from a later part of the circuit to an earlier part, usually from a tap on the output transformer back to the phase inverter.

Answered by Kajal Sharma , an ibibo Master, at 8:12 PM on April 30, 2008

hi kajol:-
Negative feedback feeds part of a system's output, inverted, into the system's input; generally with the result that fluctuations are attenuated. Many real-world systems have one or several points around which the system gravitates. In response to a perturbation, a negative feedback system with such point(s) will tend to re-establish equilibrium.

In many physical and biological systems, qualitatively different influences can oppose each other. For example, in biochemistry, one set of chemicals drives the system in a given direction, whereas another set of chemicals drives it in an opposing direction. If one, or both of these opposing influences are non-linear, an equilibrium point(s) results.

In Biology, this process (generally biochemical) is often referred to as Homeostasis; whereas in Mechanics, the more common term is equilibrium.

In Engineering, Mathematics and the Physical and Biological Sciences, common terms for the points around which the system gravitates include: attractors, stable states, eigenstates/eigenfunctions, equilibrium points, and setpoints.

'Negative' refers to the sign of the multiplier in mathematical models for feedback. In delta notation, -Δoutput is added to or mixed into the input. In multivariate systems, vectors help to illustrate how several influences can both partially compliment and partially oppose each other.

In contrast, positive feedback is a feedback in which the system responds in the same direction as the perturbation, resulting in amplification of the original signal instead of stabilizing the signal. Both positive and negative feedback require a feedback loop to operate, as opposed to feedforward, which does not rely on a feedback loop for its control of the system.

Answered by shepherd , an ibibo Master, at 5:16 PM on April 30, 2008