Applications of PN junction diode

There are some important applications of PN junction diode which are given below.

• The PN junction diode used as varactor diodes for use in voltage controlled tuning circuits as may be found in radio and TV receivers.
• It is used as a rectifier in DC power supply.
• In demodulation circuits the PN junction diode used as a detector.
• In forward biased condition the PN junction diode produced light when biased with a current, so it is used in all LED lighting.
• In computers it is used as switch in logic circuits.
• PN junction diode is used as a voltage doubler, tripler, quadrupler in voltage multiplier circuits.In clipping and clapping circuits it is used for wave shaping.
• The PN junction diode used as signal diode in communication circuits.
• Used as zener diodes in voltage stabilizing circuits.