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1, rectifier diode
By using the unidirectional conductivity of the diode, alternating current alternating in direction can be converted into pulsed direct current in a single direction.
2, switching components
The diode has a small resistance under the action of the forward voltage and is in a conducting state, which is equivalent to a switch that is turned on; under the action of the reverse voltage, the resistance is large and is in an off state, like an open switch. Various switching logic circuits can be used to form various logic circuits.
3. Limiting components
After the diode is forwarded, its forward voltage drop remains essentially the same (0.7V for the silicon tube and 0.3V for the manifold). Using this feature, as a limiting component in the circuit, the signal amplitude can be limited to a certain range.
4, relay diode
It acts as a relay in the inductance of the switching power supply and in an inductive load such as a relay.
5, detection diode
It acts as a detector on the radio.
6, varactor diode
Used in the tuner of a TV set.
7, display components
Used on VCD, DVD, calculator and other displays.
8, Zener diode
The reverse breakdown voltage is constant and recoverable after breakdown. This feature can be used to implement a voltage regulator circuit.