phase variable

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• Variable valve timing — Variable valve timing, or VVT, is a generic term for an automobile piston engine technology. VVT allows the lift or duration or timing (some or all) of the intake or exhaust valves (or both) to be changed while the engine is in operation. Two… …   Wikipedia

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• phase — [ faz ] n. f. • 1661 astron.; h. 1544 fig.; répandu XIXe; gr. phasis « lever d une étoile » 1 ♦ Astron. Chacun des aspects que présentent la Lune et les planètes à un observateur terrestre, selon leur éclairement par le Soleil. ⇒ apparence. Les… …   Encyclopédie Universelle

• Phase distortion synthesis — is a synthesis method introduced in 1984 by Casio in its CZ range of synths, and similar to Frequency modulation synthesis in the sense that they are both built on phase modulation. Basically a sine wave is played, but by modifying the phase… …   Wikipedia

• Phase modulation — (PM) is a form of modulation that represents information as variations in the instantaneous phase of a carrier wave.Unlike its more popular counterpart, frequency modulation (FM), PM is not very widely used. This is because it tends to require… …   Wikipedia

• Variable de type t tauri — Les variables de type T Tauri sont des étoiles variables, nommées d après l étoile prototype T Tauri. Elles sont toujours situées auprès des nuages moléculaires et caractérisées par des variations brusques et imprévisibles de leur magnitude… …   Wikipédia en Français

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• Variable star — A star is classified as variable if its apparent brightness as seen from Earth changes over time, whether the changes are due to variations in the star s actual luminosity, or to variations in the amount of the star s light that is blocked from… …   Wikipedia

• Phase-locked loop — PLL redirects here. For other uses, see PLL (disambiguation). A phase locked loop or phase lock loop (PLL) is a control system that generates an output signal whose phase is related to the phase of an input reference signal. It is an electronic… …   Wikipedia

• phase — phaseless, adj. phasic, phaseal, adj. /fayz/, n., v., phased, phasing. n. 1. any of the major appearances or aspects in which a thing of varying modes or conditions manifests itself to the eye or mind. 2. a stage in a process of change or… …   Universalium