Application of PN diode

Application of PN diode:

An ideal P-N junction diode is a two terminal polarity sensitive device that has zero resistance when it is forward biased and infinite resistance(i.e.,diode does not conduct)when reverse biased.Because of this property the diode find use in many application as enumerated below:

zener diode

1. As a rectifiers in dc power supplies.
2. In demodulation or detector circuits.
3. In clamping networks employed as dc restorers in TV receivers and voltage multipliers.
4. In  clipping circuits used as wave shaping circuits in computers,radars,radio and TV receivers. 
5. As a switches in digital logic circuits.The same P-N junction with different doping concentrations finds special applications as follows:(i) As zener diodes in voltage regulators,peak clippers,and in switching operation.(ii) As tunnel diodes as a relaxation oscillator at microwave frequencies.(iii) As light-emitting diodes (LEDs)in digital displays.(iv) As varactor diodes in tuning sections of radio and TV receivers.
6. pn diode use in LED.
7. LASER diode in optical communication.
8. zener diode use in voltage regulator.
9. PIN diode use in optical communication.
10. use in clipping circuits as a wave shaping circuits in computer,radars,radio and TV receivers.

LASER