variable feedback

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• Variable Coding and Modulation — is a type of data frame structure, where the size, coding and modulation type of the frame is best varied to the conditions.While VCM is a one way process, if a feedback loop (or return channel) is introduced then this can taken further to… …   Wikipedia

• Variable envelope return path — (VERP) is a technique used by some electronic mailing list software to enable automatic detection and removal of undeliverable e mail addresses. It works by using a different return path (also called envelope sender ) for each recipient of a… …   Wikipedia

• Variable-gain amplifier — A variable gain or voltage controlled amplifier is an electronic amplifier that varies its gain depending on a control voltage (often abbreviated CV). VCAs have many applications, including audio level compression, synthesizers and amplitude… …   Wikipedia

• Feedback — Rétroaction Représentation d une boucle rétroactive. La rétroaction (on utilise aussi couramment le terme anglais feedback), est, au sens large, l’action en retour d’un effet sur le dispositif qui lui a donné naissance, et donc, ainsi, sur elle… …   Wikipédia en Français

• feedback variable — grįžtamojo ryšio signalas statusas T sritis automatika atitikmenys: angl. feedback variable; return signal vok. Echosignal, n; Rückführgröße, f; Rückführsignal, n; Rückführvariable, f; Rückmeldung, f rus. сигнал обратной связи, m pranc. signal de …   Automatikos terminų žodynas

• Variable-frequency oscillator — A variable frequency oscillator (VFO) in electronics is a oscillator with an oscillation frequency that can be electronically changed (hence, variable).cite book |title=The ARRL Handbook for Radio Amateurs, Sixty Eighth Edition |editor=Larry D.… …   Wikipedia

• Variable rate feeder — A variable rate feeder is a piece of industrial control equipment used to deliver solid material at a known rate into some process.A number of different techniques and transport mechanisms are used, but these broadly split into these categories,… …   Wikipedia

• feedback potentiometer — A variable resistance device which monitors the position of the shaft to which it is affixed and reports the position to the control head …   Dictionary of automotive terms

• Negative feedback amplifier — Figure 1: Ideal negative feedback model A negative feedback amplifier (or more commonly simply a feedback amplifier) is an amplifier which combines a fraction of the output with the input so that a negative feedback opposes the original signal.… …   Wikipedia

• Positive feedback — Alarm or panic can spread by positive feedback among a herd of animals to cause a stampede. Positive feedback is energy taken from the output of a system and reapplied to the input, which is phase congruent with the input signal. A system… …   Wikipedia

• Climate change feedback — See also: Avoiding dangerous climate change, Runaway climate change, and Abrupt climate change Climate change feedback is important in the understanding of global warming because feedback processes may amplify or diminish the effect of each… …   Wikipedia