The diode (of the Greek di two, double; hodos way, way) is a Electronics component. It is a dipole non-linear and polarized (or not-symmetrical). The direction of connection of the diode thus has an importance on the operation of the assembly.
There exist many families of electronics components whose designation contains the word diode and all these components are carried out around a Jonction P-N . Without additional precision, this word indicates a dipole which lets pass the electric current only in one direction. This dipole is also called diode rectifier because it is used to carry out the Redresseur S which make it possible to transform the alternative course of the sector into D.C. current.
History
Before the Semiconductor advent of the S, the diodes existed in the form of electron tubes much less practical to implement.
Usual applications
Electronics
The diodes are used in rectifying and clipping assemblies mainly.Like discrete component (component used separately), they can be used as locating pin in a circuit where the polarity is essential to the good performance by preventing the flow of the current in the bad direction.
Electrical engineering
The diodes are one of the Dipôle S basic of the electronic of power.- They can be used in alternative course to decrease the power provided by the food to a receiver: by removing one of alternations, they make it possible to divide by two the power transmitted to the load at a very moderate cost. This technique is used to obtain two powers of heating in the Sèche-cheveux, a diode, placed in series with the resistance of heating, is put in short-circuit by a Interrupteur to obtain the power of maximum heating.
The diodes are frequently used in the field of rectification of Alternative course:
- rectification simple alternation: only one diode is necessary.
- rectification doubles alternation: one uses for that a Pont of diodes.
Manufacture
The diodes are manufactured starting from Semi-conducteur S, its principle physical of operation is used in many active components in electronics.A diode is created by joining a substrate rich in electron S free (Semi-conducteur standard NR, metal) with an overdrawn substrate in electrons (standard semiconductor P, majority holes).
A diode is the junction of two semiconductors: one doped " P" the other doped " N".
Only the Diode Gunn escapes this principle: being made up only of one monolithic bar of AsGa, its name diode must be regarded as an abuse language.
Theoretical operation
The diode, the manner of a valve, allows the passage of the current only in one direction. It is a polarized dipole, the anode and cathode is thus located on the component| Random links: | Vaucouleurs (river) | Street Fighter (video game) | Monitor-teacher | Fascé | Rule of Our-Lady-of-Saguenay |