Where are diodes used?

Diodes are used in a variety of electronic circuits, and here are some of the common application areas:

Rectifiers: Diodes convert AC signals into DC signals for use in power supplies** and electronic devices.

Signal detection: Diodes can be used as signal detectors to detect the strength and frequency of radio, audio, and other signals.

Voltage regulators: In electronic circuits, diodes can be used to stabilize voltage and protect other components from excessive voltage.

Switches: Diodes can be used as electronic switches to control the on/off of current, such as in logic gate circuits.

Signal modulation and demodulation: In communication systems, diodes can be used to modulate and demodulate signals in order to transmit information while transmitting and receiving signals.

Light-emitting diodes: LEDs are a special type of diode that converts electrical energy into light energy and is used in areas such as indicator lights, displays, and lighting.

Solar cells: A solar cell is actually a special type of diode that converts solar energy into electricity.

Diodes are made of semiconductor materials.

Silicon, selenium, germanium, etc.), an electronic device made of eggplant, has unidirectional conductivity, that is, when the diode anode and cathode are added with a forward voltage, the diode is turned on. So what is the role of the diode virtual state?

1. Rectification: The unidirectional conductivity of the diode can be used to alternate the direction of alternating current.

Converted into a pulsed direct current in a single direction.

2. Switch: The resistance of the diode is very small under the action of forward voltage, and it is in the conduction state, which is equivalent to a switch-on; Under the action of the reverse voltage, the resistance is very large, and it is in a cut-off state, like an open switch. Using the switching characteristics of diodes, various logic circuits can be composed.

3. Limiting: After the diode is turned on, its forward voltage drop basically remains unchanged (silicon tube, germanium tube. This feature can be used as a limiting element in the circuit to limit the signal amplitude within a certain range.

4. Freewheeling: Neutralize inductive loads such as relays in the inductance of switching power supplies.

It plays a freewheeling role.

5. Detection: on the radio.

It plays the role of wave detection.

6. Variable capacification: used in the high-frequency head of the electric observation machine.

7. Display: used on VCD, ***, calculator and other displays.

8. Voltage stabilization: voltage stabilization diode.

It is essentially a surface-junction silicon diode, and the Zener diode operates in a reverse breakdown state. In the manufacturing process of the diode, it has low-voltage breakdown characteristics. The reverse breakdown voltage of the regulator diode is constant, and a current-limiting resistor is inserted in series in the regulator circuit to make the regulator tube.

The current does not exceed the permissible value after the breakdown, so the breakdown state can be continued for a long time without damage.

9. Trigger: The trigger diode, also known as the bidirectional trigger diode (DIAC), is a two-terminal semiconductor device with a three-layer structure and symmetry. It is commonly used to trigger bidirectional thyristors and is used for overvoltage protection in circuits.

That's all for you on what a diode does.

What is the role of a diode. Many people only know that diodes are widely used in life or industrial circuits, but they don't know what diodes are made of, what their real role is, and where they play a role. Here's what a diode does.

The most common function of a diode is to allow only current to pass through a single direction (known as forward bias) and to block it in reverse direction (known as reverse bias). Therefore, the diode can be thought of as an electronic version of the check valve.

Early vacuum electron diodes;It is an electronic device that is capable of conducting electric current in one direction. Inside the semiconductor diode, there is a PN junction with two lead terminals, and this electronic device has the conductivity of unidirectional current according to the direction of the applied voltage.

Generally speaking, a crystal diode is a p-n junction interface formed by the sintering of p-type semiconductors and n-type semiconductors. A space charge layer is formed on both sides of its interface, which constitutes a self-built electric field.