DIODE:
A diode is a electronic device which are allows flow of current in one direction. it is a polarized component with two leads, called the cathode and
the anode. The cathode is normally marked with a silver or cultured band.
TYPES OF DIODE:
Light Emitting Diode.
Photodiode.
PN junction diode.
Zener diode.
Laser diode.
Avalanche diode.
Schottky diode.
1.Forward bias-
The voltage potential is connected positive,(+ve) to the p-type material and negative ,
to the Ntype material across the diode and then resulting which effect of decreasing the PN junction diodes width.
2. Revers Bias-
The voltage potential is connect negative ,(-ve) to the p-type material and positive,(+ve)to the n types material across the
diode in the resulting which effect increasing the PN junction diodes width.
VI characteristics of PN junction Diode:
When a diode is connect in a forward bias condition a negative voltage is applied to the N-type material and a positive voltage is applied to the
p-type material. if the external voltage became greater than the value the value of the potential
barrier, approx. 0.7 volts for silicon and 0.3volts for germanium, the potential barrier apposition will be overcome and the current will start to flow.
USES OF DIODE:
The diode is used for best way as Rectifier, Signal Limiters, Voltage,
signal mixers, signal demodulators, and oscillators, Voltage Regulators ,signal demodulators ,Switches,
The fundamental property of a diode is proclivity to conduct electric current in only one direction.
The advantages of Diodes include:
Diodes square measure compact in size and compatible.
Designing electronic circuit is easy with bound diodes like Zener diodes.
Diodes facilitate in dominant this flow.
These diodes turn out less unwanted noise.
Certain diodes like Schottky diodes will operate at high frequencies.
Drawbacks or disadvantages of Diode:
Following are the drawbacks or disadvantages of Diode:
➨Semiconductor diode can't stand up to terribly high reverse voltage.
➨It offers poor response.
➨It has reverse saturation current.
➨Noise level is high in conductor at high frequencies.
➨Different diodes have distinctive advantages and downsides and thence refer individual blessings and drawbacks of several diode.
Function of diode:
As we know that diode is a semiconductor device that fundamentally behave as a one-way switch for current. It allows current to flow easily in one direction, but critically
moderate current from flowing in the opposite direction.
Applications and Uses of diodes
There square measure varied forms of diodes and these diodes square measure utilized in varied ways that.
The most basic operate would be ever-changing AC current to DC current by removing some a part of the signal. This practicality would create them rectifiers. {they square measure|they're} utilized in electrical switches and are utilized in surge protectors as a result of they will stop a spike within the voltage.
Diodes facilitate in playacting digital logic. numerous diodes square measure used like logic gates and utilized in fashionable processors.
They are used for uninflected signals from a provide. for instance, one in all the foremost uses of diodes is to get rid of negative signals from AC current. this is often referred to as signal reception. This operate is largely utilized in radios as a filtering system so as to extract radio signals from a carrier.
They are additionally utilized in making power provides and voltage doublers. employing a full wave rectifier can facilitate to deliver a additional stable voltage. Combination of a diode with a condenser can facilitate to create little AC voltage multiply to form a awfully high voltage.
The light-weight emitting diodes or LEDs square measure utilized in sensors and additionally in optical device devices any several alternative light illumination devices.
Zener diodes square measure used as voltage regulators and varactors square measure utilized in electronic standardization and varistors square measure utilized in suppressing AC lines
Diodes square measure the idea of op-amps and transistors.
These were a number of the uses of diodes that may be seen within the sensible world. For additional such physics articles and vital notes, keep visiting BYJU’S.
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