vacuum tube(redirected from Firefet)
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An electron tube from which all or most of the gas has been removed, permitting electrons to move with low interaction with any remaining gas molecules.
(Electronics) another name for valve3
an electron tube from which almost all air or gas has been evacuated.
An electron tube from which all air has been removed so that the moving electrons don't collide with any gas particles and can move more efficiently from one electrode to the other. Cathode-ray tubes, which include television picture tubes and other video display tubes, are the most widely used vacuum tubes. Compare electron tube.
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|Noun||1.||vacuum 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
elektronkaelektronska cijevvakuumska cijev