PRACTICAL 05 Full wave rectification using center tapped

PRACTICAL # 05 Full wave rectification using center tapped transformer. By: Engr. Irshad Raheem Memon

OBJECTIVE � Objective of this practical is to learn that how full cycle of an AC signal is converted into a pulsating DC signal with the help of center tapped transformer

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.

What is Full wave Rectification � 1 st step Figure 1(a)

Full Wave Rectification Continues. . �Center tapped transformer is used to divide secondary voltage into two equal halves. During positive half cycle of input AC signal, diode D 1 is forward biased and diode D 2 is reverse biased as shown in figure 1 (a).

Full Wave Rectification continues. . � 2 nd Step Figure 1(b)

Full Wave Rectification Continues. . �During negative half cycle input AC signal, diode D 1 is reverse biased and diode D 2 is forward 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 half wave center tapped rectified output signal is 0. 5 Vp(sec)-0. 7

Figure Showing Input & output signal of Full Wave Rectification process

Coming Towards Objective now

Required Apparatus �Two Diodes �Breadboard �Multimeter �Oscilloscope �Step Down Centre Tapped Transformer �Connecting Wire etc.

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

Procedure Figure 01 in Multism FIGURE 01

Result on Oscilloscope & Voltmeter of Fig 01 circuit

OBSERVATION �With the help of oscilloscope it is observed that AC input signal is converted into pulsating DC signal as shown in figure 02.

ANY QUERY ?