Electronics Glossary · J

Electronics glossary — Letter J

9 definitions of electronic component and semiconductor terms starting with J. Part of the Hybrid Electronics glossary — an A–Z working reference for engineers and buyers.

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9 terms starting with J

  • jack
    A connecting device into which a plug can be inserted to make circuit connections.
  • Jacket
    1.) A material covering over a wire or cable assembly. 2.) Outer covering of a dual-wall heat-shrinkable tubing.
  • jackscrew
    (connector/accessory) A mechanical fastening device (one or two per connector) used to draw mating connectors together and to separate them. Includes a threaded screw on one connector that engages a threaded bushing on the mating connector.
  • JAN specification
    Joint Army-Navy specification.
  • jitter
    Short-term variation of pulses from their ideal position in time.
  • Jones block
    Jones is the name of the originator of barrier blocks. The term “Jones block” is sometimes erroneously used to describe terminal strips and barrier blocks in general.
  • Joule
    A unit of energy or work, equal to one watt of power applied for one second. In more fundamental units, a joule is defined as the work required to move an object one meter while applying a force of one newton (N), where a newton is the force required to accelerate a one kilogram mass at one meter per square second.
  • jumper
    (1) A direct electrical connection, which is not a portion of the conductive pattern, between two points on a printed circuit. (2) Usually unjacketed twisted pair wire used to make a cross connection.
  • Junction
    The plane in a semiconductor device where two layers that have opposing-polarity dopants physically meet.