Center Tapped Transformer:




The circuit for the full wave rectifier using two pn diode, load resistor RL and
a center tapped transformer to supply the input of the secondary to both the diodes
equally is shown below.

Operation


When the input voltage from the secondary of the transformer is positive, D1
conducts since it is forward biased. D2 is open circuit since it is reverse biased. The
current is passed through the diode and obtained across the load resistor.


When the input voltage from the secondary of the transformer is negative, D2
conducts since it is forward biased. D2 is open circuit since it is reverse biased. The
current is passed through the diode and obtained across the load resistor.


Hence, for both the positive and negative going voltage there is voltage at the
output of the FWR.





Let vi be the input voltage obtained the transformer secondary.

                   Vi = Vm sinwt = Vm sin a ---(5.1.26)


Where, Vm is the amplitude of the input voltage (v), w is the angular
frequency in radians/second. a is in radians.

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