Welcome to our Presentation

Presentation on Zener diode

& Full wave rectifier

Course name- Analog Electronics ICourse code- EEE223

Presented by1. Abu Mohammad Fazlay Rabby Id:152-33-26192. Mousumi Nargish Id :152-33-2649

Contents

▪ Zener diode▪ How it works ▪ Symbol▪ Condition▪ Application of Zener diode▪ Bridge rectifier▪ Bridge rectifier with capacitor and without capacitor▪ Graph of bridge rectifier▪ Application of bridge rectifier

Zener diode

▪ A Zener Diode is a special kind of diode which permits current to flow in the forward direction as normal, but will also allow it to flow in the reverse direction.

Working principle : Zener breakdownInvention : Clarence Melvin Zenerconfiguration : Anode and cathode

How it works

▪ If it connected with forward direction it will work exactly the same as a standard diode.

▪ when the voltage reaches the breakdown voltage (VBR), suddenly current can flow freely through it.

▪ It keeps constant voltage .

Symbol of a Zener Diode

Figure-Zener diode

ConditionBreakdown condition of a Zener diode

VN-VP ≥ VZ

Application of Zener diode

▪ Zener diodes are used in Voltage stabilizers (or) shunt regulators ;

▪ Used in Over voltage protection circuits ;

▪ Zener diodes are used in clipping and clamping circuits especially peak clippers ;

▪ They are used as Reference elements ;

▪ Used in switching applications.

Full wave rectifier

Full wave/ H /Bridge rectifier

A Full Wave Rectifier is a circuit , which converts an ac voltage into a dc voltage.

Circuit of Bridge rectifier(without capacitor)

Bridge rectifier

(With capacitor)

Figure- Bridge rectifier with capacitor

Bridge connection

Graph

With capacitor

Applications of Bridge Rectifier :

▪ Because of their low cost compared to center tapped they are widely used in power supply circuit.

▪ This can be used to detect the amplitude of radio signal.

▪ Bridge rectifiers can be used to supply polarized voltage in welding.

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