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Diode It is an electronic device that ideally conducts in only one direction.

Actual Features Leg Leg Anode Cathode

PN Junction of DIODE ,[object Object]

In P- type material, the electron is called minority carrier and hole is majority carrier.,[object Object]

Diode Applications ,[object Object],The first use for the diode was the demodulation of amplitude modulated (AM) radio broadcasts. The history of this discovery is treated in depth in the radio article

[object Object],Rectifiers are constructed from diodes, where they are used to convert alternating current (AC) electricity into direct current (DC).

[object Object],Diodes are frequently used to conduct damaging high voltages away from sensitive electronic devices.

[object Object],Diodes can be combined with other components to construct AND and OR logic gates. This is referred to as diode logic.

[object Object],In addition to light, mentioned above, semiconductor diodes are sensitive to more energetic radiation.

[object Object],A diode can be used as a temperature measuring device, since the forward voltage drop across the diode depends on temperature, as in a Silicon band gap temperature sensor.

[object Object],Diodes will prevent currents in unintended directions. To supply power to an electrical circuit during a power failure, the circuit can draw current from a battery.

Types of Diodes ,[object Object], It is one of the most popular type of diodes and when this diode permits the transfer of electric current between the electrodes, light is produced.

[object Object],This type of diode operates in the reverse bias, and used avalanche effect for its operation. Generally, the avalanche diode is used for photo-detection, wherein high levels of sensitivity can be obtained by the avalanche process.

[object Object],This type of diode is different from the LED type, as it produces coherent light. These diodes find their application in DVD and CD drives, laser pointers, etc. Laser diodes are more expensive than LEDs.

[object Object],This type of diode provides a stable reference voltage, thus is a very useful type and is used in vast quantities. The diode runs in reverse bias, and breaks down on the arrival of a certain voltage.

[object Object],These diodes are used to rectify alternating power inputs in power supplies. They can rectify current levels that range from an amp upwards. If low voltage drops are required.

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