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- Voltage-regulator_tube abstract "A voltage-regulator tube (VR tube) is an electronic component used as a shunt regulator to hold a voltage constant at a pre-determined level.Physically, these devices resemble vacuum tubes, but there are two main differences: Their glass envelopes are filled with a gas mixture, and They have a cold cathode; the cathode is not heated with a filament to emit electrons.Electrically, these devices resemble Zener diodes, with the following major differences: They rely on gas ionization, rather than Zener breakdown The unregulated supply voltage must be 15–20% above the nominal output voltage to ensure that the discharge starts The output can be higher than nominal if the current through the tube is too low.When sufficient voltage is applied across the electrodes, the gas ionizes, forming a glow discharge around the cathode electrode. The VR tube then acts as a negative resistance device; as the current through the device increases, the amount of ionization also increases, reducing the resistance of the device to further current flow. In this way, the device conducts sufficient current to hold the voltage across its terminals to the desired value.Because the device would conduct a nearly unlimited amount of current, there must be some external means of limiting the current. Usually, this is provided by an external resistor upstream from the VR tube. The VR tube then conducts any portion of the current that does not flow into the downstream load, maintaining an approximately constant voltage across the VR tube's electrodes. The VR tube's regulation voltage was only guaranteed when conducting an amount of current within the allowable range. In particular, if the current through the tube is too low to maintain ionization, the output voltage can rise above the nominal output—as far as the input supply voltage. If the current through the tube is too high, it can enter an arc discharge mode where the voltage will be significantly lower than nominal and the tube may be damaged.Some voltage-regulator tubes contained small amounts of radionuclides to produce a more reliable ionization.The Corona VR tube is a high-voltage version that's hydrogen-filled at close to atmospheric pressure, for voltages ranging from 400 V to 30 kV at tens of microamperes. It has a coaxial form; the outer cylindrical electrode is the cathode and the inner one is the anode. The voltage stability depends on the gas pressure.".
- Voltage-regulator_tube thumbnail Ccvrt.svg?width=300.
- Voltage-regulator_tube wikiPageID "1537097".
- Voltage-regulator_tube wikiPageLength "6779".
- Voltage-regulator_tube wikiPageOutDegree "41".
- Voltage-regulator_tube wikiPageRevisionID "588255436".
- Voltage-regulator_tube wikiPageWikiLink Ampere.
- Voltage-regulator_tube wikiPageWikiLink Avalanche_diode.
- Voltage-regulator_tube wikiPageWikiLink Capacitor.
- Voltage-regulator_tube wikiPageWikiLink Category:Electrical_breakdown.
- Voltage-regulator_tube wikiPageWikiLink Category:Vacuum_tubes.
- Voltage-regulator_tube wikiPageWikiLink Cathode.
- Voltage-regulator_tube wikiPageWikiLink Coaxial.
- Voltage-regulator_tube wikiPageWikiLink Cold_cathode.
- Voltage-regulator_tube wikiPageWikiLink Corona_discharge.
- Voltage-regulator_tube wikiPageWikiLink Electric_arc.
- Voltage-regulator_tube wikiPageWikiLink Electric_current.
- Voltage-regulator_tube wikiPageWikiLink Electric_glow_discharge.
- Voltage-regulator_tube wikiPageWikiLink Electrical_filament.
- Voltage-regulator_tube wikiPageWikiLink Electrical_resistance.
- Voltage-regulator_tube wikiPageWikiLink Electrical_resistance_and_conductance.
- Voltage-regulator_tube wikiPageWikiLink Electronics.
- Voltage-regulator_tube wikiPageWikiLink File:Ccvrt.svg.
- Voltage-regulator_tube wikiPageWikiLink Gas.
- Voltage-regulator_tube wikiPageWikiLink Glow_discharge.
- Voltage-regulator_tube wikiPageWikiLink Hydrogen.
- Voltage-regulator_tube wikiPageWikiLink Incandescent_light_bulb.
- Voltage-regulator_tube wikiPageWikiLink Ionization.
- Voltage-regulator_tube wikiPageWikiLink Ionize.
- Voltage-regulator_tube wikiPageWikiLink List_of_vacuum_tubes.
- Voltage-regulator_tube wikiPageWikiLink Negative_resistance.
- Voltage-regulator_tube wikiPageWikiLink Neon_lamp.
- Voltage-regulator_tube wikiPageWikiLink Parallel_circuit.
- Voltage-regulator_tube wikiPageWikiLink RETMA_tube_designation.
- Voltage-regulator_tube wikiPageWikiLink Radionuclide.
- Voltage-regulator_tube wikiPageWikiLink Relaxation_oscillator.
- Voltage-regulator_tube wikiPageWikiLink Resistor.
- Voltage-regulator_tube wikiPageWikiLink Series_and_parallel_circuits.
- Voltage-regulator_tube wikiPageWikiLink Series_circuit.
- Voltage-regulator_tube wikiPageWikiLink Solid-state_electronics.
- Voltage-regulator_tube wikiPageWikiLink Solid_state_(electronics).
- Voltage-regulator_tube wikiPageWikiLink Vacuum_tube.
- Voltage-regulator_tube wikiPageWikiLink Voltage.
- Voltage-regulator_tube wikiPageWikiLink Voltage_regulator.
- Voltage-regulator_tube wikiPageWikiLink Zener_breakdown.
- Voltage-regulator_tube wikiPageWikiLink Zener_diode.
- Voltage-regulator_tube wikiPageWikiLink Zener_effect.
- Voltage-regulator_tube wikiPageWikiLink File:5651RegulatorTubeInOperation.jpg.
- Voltage-regulator_tube wikiPageWikiLinkText "Voltage reference".
- Voltage-regulator_tube wikiPageWikiLinkText "Voltage stabilisers and references".
- Voltage-regulator_tube wikiPageWikiLinkText "Voltage stabilizer".
- Voltage-regulator_tube wikiPageWikiLinkText "Voltage stabilizers".
- Voltage-regulator_tube wikiPageWikiLinkText "Voltage-regulator tube".
- Voltage-regulator_tube wikiPageWikiLinkText "voltage reference".
- Voltage-regulator_tube wikiPageWikiLinkText "voltage-regulator tube".
- Voltage-regulator_tube wikiPageWikiLinkText "voltage-regulator tubes".
- Voltage-regulator_tube hasPhotoCollection Voltage-regulator_tube.
- Voltage-regulator_tube wikiPageUsesTemplate Template:Electronic_components.
- Voltage-regulator_tube wikiPageUsesTemplate Template:Portal.
- Voltage-regulator_tube wikiPageUsesTemplate Template:Reflist.
- Voltage-regulator_tube subject Category:Electrical_breakdown.
- Voltage-regulator_tube subject Category:Vacuum_tubes.
- Voltage-regulator_tube hypernym Component.
- Voltage-regulator_tube type MilitaryUnit.
- Voltage-regulator_tube type Component.
- Voltage-regulator_tube comment "A voltage-regulator tube (VR tube) is an electronic component used as a shunt regulator to hold a voltage constant at a pre-determined level.Physically, these devices resemble vacuum tubes, but there are two main differences: Their glass envelopes are filled with a gas mixture, and They have a cold cathode; the cathode is not heated with a filament to emit electrons.Electrically, these devices resemble Zener diodes, with the following major differences: They rely on gas ionization, rather than Zener breakdown The unregulated supply voltage must be 15–20% above the nominal output voltage to ensure that the discharge starts The output can be higher than nominal if the current through the tube is too low.When sufficient voltage is applied across the electrodes, the gas ionizes, forming a glow discharge around the cathode electrode. ".
- Voltage-regulator_tube label "Voltage-regulator tube".
- Voltage-regulator_tube sameAs Glimmstabilisator.
- Voltage-regulator_tube sameAs Gāzizlādes_stabilitrons.
- Voltage-regulator_tube sameAs Jarzeniówka_stabilizacyjna.
- Voltage-regulator_tube sameAs m.058vc7.
- Voltage-regulator_tube sameAs Стабилитрон_тлеющего_разряда.
- Voltage-regulator_tube sameAs Q1318793.
- Voltage-regulator_tube sameAs Q1318793.
- Voltage-regulator_tube wasDerivedFrom Voltage-regulator_tube?oldid=588255436.
- Voltage-regulator_tube depiction Ccvrt.svg.
- Voltage-regulator_tube isPrimaryTopicOf Voltage-regulator_tube.