structure amplifier

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• STRUCTURE DISSIPATIVE — Le terme «structure dissipative» a été créé, en 1969, par Ilya Prigogine pour souligner la signification des résultats auxquels lui même et ses collaborateurs de l’école de Bruxelles venaient de parvenir: loin de l’équilibre thermodynamique,… …   Encyclopédie Universelle

• Optical amplifier — An optical amplifier is a device that amplifies an optical signal directly, without the need to first convert it to an electrical signal. An optical amplifier may be thought of as a laser without an optical cavity, or one in which feedback from… …   Wikipedia

• Crossed-field amplifier — A crossed field amplifier (CFA) is a specialized vacuum tube, first introduced in the mid 1950s and frequently used as a microwave amplifier in very high power transmitters. Raytheon engineer William C. Brown s work to adapt magnetron principles… …   Wikipedia

• Operational amplifier — A Signetics μa741 operational amplifier, one of the most successful op amps. An operational amplifier ( op amp ) is a DC coupled high gain electronic voltage amplifier with a differential input and, usually, a single ended output.[1] An op amp… …   Wikipedia

• Class-D amplifier — Block diagram of a basic switching or PWM (class D) amplifier A class D amplifier or switching amplifier is an electronic amplifier where all power devices (usually MOSFETs) are operated as binary switches. They are either fully on or fully… …   Wikipedia

• Cochlear amplifier — The cochlear amplifier was first proposed in 1948 by T. Gold[1]. This was around the time when Georg von Békésy was publishing articles observing the propagation of passive travelling waves in the dead Cochlea. Thirty years later the first… …   Wikipedia

• MILMEGA — Industry Communications Testing, EMC, Defence, Medical, High Energy Physics Research Founded 1987 Headquarters Park Road Ryde Isle o …   Wikipedia

• Delta-sigma modulation — Delta sigma (ΔΣ; or sigma delta, ΣΔ) modulation is a method for encoding high resolution or analog signals into lower resolution digital signals. The conversion is done using error feedback, where the difference between the two signals is… …   Wikipedia

• Nobel Prizes — ▪ 2009 Introduction Prize for Peace       The 2008 Nobel Prize for Peace was awarded to Martti Ahtisaari, former president (1994–2000) of Finland, for his work over more than 30 years in settling international disputes, many involving ethnic,… …   Universalium

• AMPLIFICATEURS — Un amplificateur est un dispositif électronique qui réalise sur une grandeur électrique – tension ou intensité – porteuse d’information l’opération mathématique élémentaire: multiplication par une constante, et qui accroît l’énergie véhiculée par …   Encyclopédie Universelle

• List of vacuum tubes — This is a list of vacuum tubes or thermionic valves. Before the advent of semiconductor devices, hundreds of tube types were used in consumer and industrial electronics; today only a few types are still used in specialized applications. Contents… …   Wikipedia