power supply

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power supply (plural power supplies)

  1. Used other than figuratively or idiomatically: see power,‎ supply.
    The utility will invest in power plants and transmission lines to ensure a stable power supply.
    • 1961 December, “Planning the London Midland main-line electrification”, in Trains Illustrated, page 722:
      The track-sectioning cabins house not only switchgear for the traction current, but also transformers to provide power supplies to the signalling equipment.
  2. A source of power such as the mains or a generator.
  3. That part of a piece of electronic apparatus that provides appropriate voltages for the rest of the electronics from the connected AC source.



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