Diode
part · 1904 · Electric age
Lets current pass in one direction.
Inventor: Jagadish Chandra Bose.
Principles and materials it uses
- P–n junction — uses. A semiconductor diode is a p–n junction.
- Glass — is made of. Fleming’s valve diode is a glass bulb.
- Semiconductor — is made of. Later — a semiconductor.
Where it is used
- Crystal radio — is part of. A crystal detector is a diode.
History: what it evolved from and what it influenced
- Vacuum tube — evolved from. The first diode was a vacuum tube (Fleming); later diodes became semiconductor devices.
- Triode — evolved into. De Forest added a grid.
- Thyristor — evolved into. A controllable counterpart of the diode with a four-layer structure.
What it is a kind of
- LED — includes. A light-emitting diode.
- Photodiode — includes. A kind of diode.
- Zener diode — includes. A diode.