PRACTICAL 06 Bridge full wave rectification By Engr

PRACTICAL # 06 Bridge full wave rectification. By: Engr. Irshad Rahim Memon

OBJECTIVE • Objective of this practical is to learn that how a full cycle of input AC signal is converted into a pulsating DC signal with the help of bridge diode circuit.

Some Concept Regarding Diode & Rectification • Diode is a two terminal semiconductor device with an ability to conduct current only in one direction after a certain amount of voltage called barrier potential is applied to it in a proper way.

Coming Towards Rectification. . • What is Rectification is a process of conversion of AC signal into a pulsating DC signal. Half wave rectifier is able to convert only half cycle of AC signal into pulsating DC signal. Circuit for half wave rectifier is shown in figure 01.

How Full Wave Bridge Diode performs Rectification? • 1 st step Figure 1(a)

Full Wave Bridge Rectification Continues. . • During positive half cycle of input AC signal, diodes D 1 & D 2 are forward biased and diodes D 3 & D 4 are reverse biased as shown in figure 1 (a).

Full Wave Bridge Rectification Continues. . • 2 nd Step Figure 1(b)

Full Wave Bridge Rectification Continues. . • During negative half cycle of input AC signal, diodes D 3 & D 4 are forward biased and diodes D 1 & D 2 are reverse biased as shown in figure 1 (b), which means rectified output is obtained during both positive and negative half cycle of input AC, whereas amplitude of full wave center tapped rectified output signal is Vp(sec) -1. 4 volts.

Figure Showing Input & output signal of Full Wave Bridge Rectification process

Coming Towards Objective now

Required Apparatus • • • Bridge Rectifier Breadboard Multimeter Oscilloscope Step Down Transformer Connecting Wire etc.

Procedure • Prepare full wave bridge rectifier circuit on breadboard as shown in the figure 01 and observe input and output signals on the oscilloscope.