electron tube

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electron tube

n.
A sealed enclosure, either highly evacuated or containing a controlled quantity of gas, in which electrons can be made sufficiently mobile to act as the principal carriers of current between at least one pair of electrodes.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

electron tube

n
(Electronics) an electrical device, such as a valve, in which a flow of electrons between electrodes takes place. Also called: vacuum tube Sometimes shortened to: tube
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

elec′tron tube`


n.
an electronic device that consists typically of a sealed glass bulb containing two or more electrodes, used to generate, amplify, and rectify electric oscillations and alternating currents.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

electron tube

A sealed glass tube containing either a vacuum or a small amount of gas, in which electrons move from a negatively charged electrode to a positively charged one. With the application and varying of an electric or magnetic field, the direction and number of electrons in the tube can be controlled. Electron tubes are used to amplify signals and change AC currents to DC currents. They have been mostly replaced by transistors but are still used in television screens and computer monitors and in microwave technology. Compare vacuum tube.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.electron tube - electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelopeelectron tube - electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope
acorn tube - a small vacuum tube; used at high frequencies
anode - a positively charged electrode by which electrons leave an electrical device
cathode - a negatively charged electrode that is the source of electrons entering an electrical device
circuit, electric circuit, electrical circuit - an electrical device that provides a path for electrical current to flow
diode, rectifying tube, rectifying valve - a thermionic tube having two electrodes; used as a rectifier
electrode - a conductor used to make electrical contact with some part of a circuit
electronic device - a device that accomplishes its purpose electronically
electron multiplier - a vacuum tube that amplifies a flow of electrons
gas-discharge tube - a tube in which an electric discharge takes place through a gas
control grid, grid - an electrode placed between the cathode and anode of a vacuum tube to control the flow of electrons through the tube
klystron - an electron tube used to generate or amplify electromagnetic radiation in the microwave region by velocity modulation
magnetron - a diode vacuum tube in which the flow of electrons from a central cathode to a cylindrical anode is controlled by crossed magnetic and electric fields; used mainly in microwave oscillators
pentode - a thermionic tube having five electrodes
plate - the positively charged electrode in a vacuum tube
television pickup tube, television-camera tube - a tube that rapidly scans an optical image and converts it into electronic signals
tetrode - a thermionic tube having four electrodes
triode - a thermionic vacuum tube having three electrodes; fluctuations of the charge on the grid control the flow from cathode to anode which makes amplification possible
X-ray tube - a vacuum tube containing a metal target onto which a beam of electrons is directed at high energy for the generation of X rays
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
The company's product lines include dielectric insulating materials, brass electrode rules, modular tooling systems, specialty vinyl films, PVC foam, triode electron tubes, RF system components and more.
Because of his interest in a fast-acting bypass switch, Kappenman became associated with Advanced Fusion Systems (AFS) of Newtown, CT, a company developing extremely high-power electron tubes. Such a tube could be used as a bypass switch, and this is one of the applications discussed in a paper jointly written by Kappenman and AFS CTO and president Curtis Birnbach.
Thales said the excellent performance of its electron tubes, recognised worldwide, is based on a long experience in the development and production of these highly specialised products, demanding expertise and extensive industrial facilities.
The low-profile DVSL-100C scroll vacuum.pump is suited for clean process applications including roughing turbo pumps, vacuum forming, vacuum drying (only for water based), vacuum chuck, deairator, roughing and regeneration of Cryo pumps, gas substitution, and pumping for electron tubes. Features include oil-free operation; high vapor and particle pumping capacity; a single scroll design; compact size; and air flush.
The journal is published quarterly and is devoted to the science and technology of all types of electronic components, including semiconductor materials, thick-film materials, electron tubes, capacitors, and solid-state memories.
More than 100 years have passed after invention by Wenelt of oxide cathodes of electron tubes, which are widely used in electron technology [1].
Paris, France 8/23/05 -- Photonis Holding SAS has acquired Burle Industries, a manufacturer of specialized electron tubes and electro-optic products, including photomultiplier tubes, Channeltron mass spectrometry detectors and advanced performance detectors.
The chapter Circuits Based on Semiconductor Devices, after a brief mention of electron tubes, covers the most important semiconductor devices, diodes and transistors, and their applications such as oscillators, small signal, low-noise and power amplifiers, reflection amplifiers, frequency converters and multipliers as well as detectors.

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