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Rectifier circuits
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Convert AC to DC using diodes.
Diodes convert AC to DC: half-wave uses one diode, full-wave uses a bridge of four; a smoothing capacitor reduces ripple.
Phone chargers.
Output isn't pure DC without smoothing.
In more detail
A rectifier uses diodes to convert alternating current to direct current. A half-wave rectifier uses one diode, while a full-wave or bridge rectifier uses four.
Real-world uses
- Phone chargers rectify mains AC to DC.
- Power supplies in electronics convert mains to stable DC.
- Power supplies use diodes in a bridge rectifier to convert the mains AC into DC for electronics.
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Frequently asked questions
Why use a bridge rectifier?
It uses both halves of the AC cycle, giving a smoother output.
Is the output smooth?
Usually not without a capacitor or filter to smooth the ripple.
Does a rectifier give steady DC?
Not on its own. The output pulses, so a smoothing capacitor is usually added to reduce the ripple.
Related topics in Current Electricity & Circuits
Current in RC circuit · Capacitor networks · Diodes · Transistor as a switch and amplifier · Logic gates · Electrical safety