Full Wave Rectifier

 

·         Full wave Rectifier

       



Fig. shows the circuit of a full wave rectifier.

The transformer used in this circuit is known as center tapped step down transformer.

 

 

Working: The voltage across secondary of the transformer is acting as the input of the full wave rectifier.

During positive half cycle of input voltage (positive at point A) diode D1 becomes forward biased and current flows through diode D2, load resistance RL and center tapped transformer, producing a voltage drop across load

During negative half cycle of input voltage, point B becomes positive with respect to point A makes D2 forward biased.

The current through D2 and RL is shown by dotted line and arrow also flows in the direction  as that or D1 conduction.

Thus during both the input cycles, rectified positive (DC) voltage across the load RL is obtained.

The input and output waveforms of a full wave rectifier are shown in following fig.




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