====== diodes ======

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[[:category:parts|Category:Parts]]

[[:category:electric_parts|Category:Electric parts]]

==== Introduction ====

A diode is a two-terminal electronic component that conducts current primarily in one direction (asymmetric conductance); it has low (ideally zero) resistance in one direction, and high (ideally infinite) resistance in the other. A diode vacuum tube or thermionic diode is a vacuum tube with two electrodes, a heated cathode and a plate, in which electrons can flow in only one direction, from cathode to plate. A semiconductor diode, the most commonly used type today, is a crystalline piece of semiconductor material with a p–n junction connected to two electrical terminals. Semiconductor diodes were the first semiconductor electronic devices. The discovery of asymmetric electrical conduction across the contact between a crystalline mineral and a metal was made by German physicist Ferdinand Braun in 1874. Today, most diodes are made of silicon, but other semiconducting materials such as gallium arsenide and germanium are also used.

==== Challenges ====

  * package types
  * package sizes
  * capacity and rating

==== Approaches ====

==== Development targets ====

==== References ====

  * [[https://en.wikipedia.org/wiki/Diode|Wikipedia: Diode]]

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[[https://github.com/timschmidt/replimat/blob/e0bc0b855bb946bab00c75ca0d8b002ae0dc0172/wiki/diodes.html|Original archived page]] — revision 8234, 2021-09-24T10:56:58+00:00, by Tim.