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1. PRESENTER: SYED FAHIM SHAHRIAR
BSC,IN COMPUTER SCIENCES AND ENGINEERING
FULL WAVE RECTIFIER(SI DIODE)
AMERICAN
INTERNATIONAL
UNIVERSITY-
BANGLADESH

2. RECTIFIER
 Rectifier is that circuit,that convarts AC to DC.
 The following two types of rectifier circuit can be
used:
1.Half wave rectifier
2.Full wave rectifier

3. FULL-WAVE RECTIFIER
 In Full wave retification current flow through the load in
same direction for both half cycle of input ac.
 This can be achieved with two diodes working
alternatively.
 For one half cycle one diode supplies current to load
and for next half cycle another diode works.

4. CLASSIFICATION OF FULL WAVE RECTIFIER
 The full wave rectifier can be futher divided mainly
into following types.
1. Center tapped full wave rectifier.
2.Full wave bridge rectifier

5. CENTRE TAP FULL WAVE RECTIFIER
 Circuit has two diodes D1,D2 and a centre tap transformer.
 These are connected to the center tapped secondary winding of the
transformer.
 During positive half cycle Diode D1 conducts and during negetive half
cycle Diode D2 conducts.
 It can be seen that current through load RL is the same direction for both
cycle

6. FULL WAVE BRIDGE RECTIFIER
1.Full wave bridge rectifier four diodes are arranged
in the form of a bridge.
2.This configuration provides same polarity output
with either polarity.
3.The main advantage of this bridge circuit is that it
does not require a special centre tapped
transformer.
4.The single secondary winding is connected to one
side of the diode bridge network and the load to the
other side.

7. FULL WAVE BRIDGE RECTIFIER WORK
 D2 and D3 will be forward bias when we work with
positive half cycle. So current will flow.
 D1 and D4 will be reverse bias. The current will not
flow

8. FULL WAVE BRIDGE RECTIFIER WORK
 D 1 and D 4 will be forward bias when we work with
the negative half cycle. So current will flow.
 D2 and D3 will be reverse bias. The current will not
flow.
 The direction of the positive half cycle is the same
as the direction of the negative half cycle. So even
after the signal is negative, We are getting a
positive cycle at the output

9. FULL WAVE BRIDGE RECTIFIER
 Over one full cycle the input and output voltages
will appear as shown in Fig.
Vdc=2*(0.318Vm)=0.636Vm

10. FULL WAVE BRIDGE RECTIFIER
 What happens if we use silicon diode instead of
ideal Diode??
Using a silicon diode will cause voltage drop in D2
and D3 in a positive half cycle and voltage drop in
D1 and D4 in a negetive half cycle.
Vdc=0.636(Vm-2Vt)

11. FULL WAVE RECTIFIER
Output frequency of FWR:
 Output frequency of FWR is equal to double of
input frequency.
 This means when input ac completes one cycle
,rectified wave completes two cycle.
fout=2 fin

12. FULL WAVE BRIDGE RECTIFIER
Advantage:
1.Need for centre tap Xformer is eliminated.
2. PIV is one half of that of centre tap circuit.
3.Output is twice than that of centre tap circuit.
Disadvantage:
1.It is difficult to locate the centre tap on the
secondary winding.
2.Internal resistance voltage drop is twice than that of
Centre Tap Circuit.
3.The diodes used have high peak inverse voltages.

13. CONCLUSION
 To design and simulate a Full Wave Rectifier circuit
with working theory and the analysis for the full-
bridge rectifier circuit. The full-wave rectifier allows
us to convert almost all the incoming AC power to
DC.

14. THANK YOU