vacuum tube

Noun
  1. Electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope (synset 104501499)
    is a type of: electronic device - a device that accomplishes its purpose electronically
    subtypes:
    • acorn tube - a small vacuum tube; used at high frequencies
    • diode, rectifying tube, rectifying valve - a thermionic tube having two electrodes; used as a rectifier
    • 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
    • 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
    • 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
    has:
    • 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
    • electrode - a conductor used to make electrical contact with some part of a circuit
    • control grid, grid - an electrode placed between the cathode and anode of a vacuum tube to control the flow of electrons through the tube
    • plate - the positively charged electrode in a vacuum tube
    is a part of: circuit, electric circuit, electrical circuit - an electrical device that provides a path for electrical current to flow
    same as: electron tube, thermionic tube, thermionic vacuum tube, thermionic valve, tube

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