audion


audion
/aw"dee euhn, -on'/, n. Electronics.
an early type of triode.
[formerly a trademark]

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Elementary radio tube developed by Lee De Forest (patented 1907).

It was the first triode vacuum tube, incorporating a control grid as well as a cathode and an anode. It was capable of more sensitive reception of wireless signals than were the electrolytic and Carborundum detectors then in use. The Audion made possible live radio broadcasting and became the key component of all radio, telephone, radar, television, and computer systems before the invention of the transistor.

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      elementary form of radio tube developed in 1906 (patented 1907) by Lee De Forest (De Forest, Lee) of the United States. It was the first vacuum tube in which a control grid (in the form of a bent wire) was added between the anode plate and the cathode filament. The control grid enabled De Forest to modulate the current between the filament and the plate, producing the first successful electronic amplifier. With the development of multigrid tubes in the 1920s, the generic term audion fell into disuse and was replaced by more descriptive terminology. See also triode, tetrode, and pentode.

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Universalium. 2010.

Look at other dictionaries:

  • audion — ⇒AUDION, subst. masc. PHYS. (radioélectricité). Forme primitive de la triode ou lampe à trois électrodes : • L invention de la triode. Vers 1903, Lee de Forest cherchait lui aussi un détecteur sensible pour les ondes hertziennes. Après plusieurs… …   Encyclopédie Universelle

  • Audion — may be * the Audion tube, a wireless signal detector device invented by Lee De Forest in 1906. * Audion (software), a freeware media player for Apple Macintosh created by Panic. * Audion (band), an indie rock band from Columbus, Ohio. * Audion,… …   Wikipedia

  • Audión — Saltar a navegación, búsqueda Un audión de 1906. El audión es la primera válvula electrónica de tipo triodo. Con ella se lograron las primeras amplificaciones electrónicas. Contenido …   Wikipedia Español

  • Audion — Audion, Wellenanzeiger für drahtlose Telegraphie, s. Telegraphie ohne Draht …   Lexikon der gesamten Technik

  • Audion —   das, s/ s und ... onen, Audionschaltung, eine seit 1907 bekannte, in der Frühzeit der Rundfunktechnik (ab Mitte der 20er Jahre) in Einkreis Rundfunkempfängern (Audionempfängern) verwendete einfache Demodulationsschaltung mit einer… …   Universal-Lexikon

  • audion — ȁudiōn m <G audióna> DEFINICIJA fiz. elektronska cijev koja ispravlja i pojačava visokofrekventne oscilacije; demodulator s aktivnim elektroničkim elementom ETIMOLOGIJA audio + on …   Hrvatski jezični portal

  • Audion — Das Audion ist ein Rundfunk Geradeausempfänger und oft ein Einkreiser. Lee De Forest, der Erfinder des Audions, bildete das Wort aus dem lateinischen Wort audio, ich höre. 1907 patentierte De Forest die Audionröhre und die Audionschaltung.[1] Ab… …   Deutsch Wikipedia

  • Audion — Une audion de 1906. L audion est le premier tube électronique de type triode. L audion a permis de réaliser les premiers amplificateurs électroniques. Sommaire 1 Historique …   Wikipédia en Français

  • Audion — audionas statusas T sritis fizika atitikmenys: angl. audion vok. Audion, n rus. аудион, m pranc. audion, m …   Fizikos terminų žodynas

  • audion — audionas statusas T sritis fizika atitikmenys: angl. audion vok. Audion, n rus. аудион, m pranc. audion, m …   Fizikos terminų žodynas


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