Half Wave Rectifier Circuit Using Diode


Definition: The half wave rectifier circuit is a rectifier circuit, which converts an ac voltage to dc voltage.
These circuits are called half wave rectifier because it generates output of half cycle for input of full cycle. Another half cycle is wasted.
Positive half wave rectifier

Input and output waveform of positive half wave rectifier

Negative half wave rectifier

Input and output waveform of negative half wave rectifier

Working principal: For both circuit Vin is input voltage. Output is Vout. T is step down transformer. n1 is the turn ratio of primary coil and n2 is the turn ratio of secondary coil of transformer. A diode (D) is placed between Vn2 and Vout . Voltage drop at diode is Vd. R is the load resistor.
Input voltage is applied in primary coil of transformer. This voltage is step down and transferred to secondary coil. Based on the polarity of input voltage and the position of diode, the diode is forward biased (diode on) or reverse biased (diode off) and generate the output.
For positive half wave rectifier, when Vn2 is positive diode is forward biased i.e. diode is on, output is positive. When Vn2 is negative diode is reverse biased i.e. diode is off, output is zero.
For negative half wave rectifier, when Vn2 is positive diode is reverse biased because the position of diode is reverse in this circuit, so diode is off, output is zero. When Vn2 is negative diode is forward biased i.e. diode is on, output is negative.

Application: The primary application of rectifiers is to derive DC power from an AC supply (AC to DC converter). Virtually all electronic devices require DC, so rectifiers are used inside the power supplies of virtually all electronic equipment.

For more details on half wave rectifier , please visit: Half Wave Rectifier Using Diode.
For more details on rectifier circuit please visit: Rectifier Circuit Design - YouTube.
To learn more please visit: It’s All About Electronics.

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