A full-wave rectifier converts the whole of the input waveform to
one of constant polarity (positive or negative) at its output. Full-wave
rectification converts both polarities of the input waveform to DC (direct
current), and is more efficient. However, in a circuit with a non-center tapped transformer, four diodes are required instead of the one needed for half-wave
rectification. Four diodes arranged this way are called a diode bridge or bridge rectifier.
output voltage of full wave rectifier A full-wave rectifier using 4 diodes
For
single-phase AC, if the transformer is center-tapped, then two diodes
back-to-back (i.e. anodes-to-anode or cathode-to-cathode) can form a full-wave
rectifier. Twice as many windings are required on the transformer secondary to
obtain the same output voltage compared to the bridge rectifier above.
Wave
rectifier using a transformer and 2 diodes.
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