Working principle of rectifier diode

How does a rectifier diode work? We often encounter this kind of brain repair during the installation process. In order to increase everyone's understanding of rectifier diodes, today we will give you an answer to the brain repair- Diode, also known as crystal diode, abbreviated as diode, and early vacuum electronic diode; It is an electronic device with unidirectional conduction current. There is a PN junction and two leads inside the semiconductor diode

Terminals are electronic devices that have the ability to transduce unidirectional current in the direction of applied voltage. Generally speaking, a crystal diode is a p-n junction interface formed by sintering p-type and n-type semiconductors. On both sides of its interface

Form a space charge layer and create a self built electric field. When the applied voltage is equal to zero, the diffusion current caused by the concentration difference of charge carriers on both sides of the p-n junction and the drift current caused by the self built electric field are equal and in an electric equilibrium state, which is also the norm

The characteristics of the diode below.

When a forward voltage is applied, at the beginning of the forward characteristic, the forward voltage is very small and not enough to overcome the blocking effect of the electric field inside the PN junction. The forward current is almost zero, and this section is called the dead zone. This forward current cannot make the diode conduct

Voltage is called dead zone voltage. When the forward voltage exceeds the dead zone voltage, the electric field inside the PN junction is overcome, the diode conducts, and the current rapidly increases with the increase of voltage. What is the terminal voltage of the diode when conducting within the normal current range of use

The voltage that remains constant is called the forward voltage of the diode.