Full Wave Rectification

Full-wave Rectification

1. The figure above shows a circuit to produce full-wave rectification. 
2. Using an ingenious arrangement of diodes, called a bridge rectifier, this reverses the negative half of each a.c. cycle, instead of just blocking it. 
3. The result is that current always flows in the same direction through the load, no matter which way it leaves the supply. 
4. Combine a transformer (to reduce mains voltage) with a bridge rectifier and a smoothing capacitor, and you have a mains-operated d.c. power supply – as used in radios, instead of batteries.
5. Another method of full-wave rectification is to arrange two diodes to the output of a transformer as shown below. A similar result will be produced.