| 释义 |
cold cathode
cold cathode n (Electronics) electronics a cathode from which electrons are emitted at ambient temperature, due to a high potential gradient at the surface Thesaurus| Noun | 1. | cold cathode - a cathode that is a source of electrons without being heatedcathode - a negatively charged electrode that is the source of electrons entering an electrical device |
cold cathode
cold cathode[′kōld ′kath‚ōd] (electronics) A cathode whose operation does not depend on its temperature being above the ambient temperature. cold cathodeA cold cathode is a cathode in a gas-filled electron tube that is not heated by a filament. The voltage potential within the tube is sufficient to ionize the gas and cause the current to flow. For example, the backlights in earlier LCD screens were cold cathode fluorescent tubes, which were later replaced with LEDs (see CCFL). See cathode.MedicalSeecathodeAcronymsSeeCCcold cathode
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