Full wave rectifier is a device which converts complete
alternate current into direct current. The input of this circuit is very similar to
the half wave rectifier.It is nothing
but a step down transformer. In this kind of the device the output consists of
not one diode but two diodes. In between the two diodes there is a special
arrangement called central tap. The purpose of the central tap is to reverse
the phase of the current that is passing through it. When the input is
connected to both diode D1 and D2 it first passes to first diode and then to the second diode via central tap.
When the positive cycle of the
alternate current is given like input ,diode D1 will be in forward bias. Before
the same positive peak is passed to the diode D2, it is first of all passed to the central
tap therefore it will reverse that positive peek into negative peak. Hence the diode D2 will be simultaneously will be in
reverse Bias.
When the Negative peak of the
alternate current has reached the system, the diode D1 will be in reverse Bias.
The same negative peak before reaching the diode D2 is passed to the central
tap therefore it will be converted as positive peek. This is the job of the
central tap which is managed with the help of the phase reversal.
Thus the diode D2 will be in forward bias for the Negative peak of the alternate current that is reaching the circuit. All positive peaks are passed through the diode D1 and all negative peaks are passed through the diode D2.Thus all alternate current is converted into direct current.
Thus the diode D2 will be in forward bias for the Negative peak of the alternate current that is reaching the circuit. All positive peaks are passed through the diode D1 and all negative peaks are passed through the diode D2.Thus all alternate current is converted into direct current.
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