Semiconductor Devices IRectifiers

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PO Box 473768

Aurora CO 80047

Rectifiers

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Objective:

• Define the term Rectifier• Illustrate some basic Rectifiers

•Half-wave Rectifiers•Full-wave Rectifiers•Bridge-Rectifiers

Rectifiers

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Rectifier circuits are one method of converting AC to DC. By using a few components (discussed above) one can convert a simple sine wave into a DC voltage (all voltage is either always positive or always negative)

Rectifier CircuitSine waveinput

DCoutput

Rectifiers

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Combining the Transformer and Rectifier circuits allow isolation and amplitude adjustment of AC input signals to DC output.

Sine waveinput

DCoutput

Rectifier CircuitTransformer

Rectifiers

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Combining the Transformer and Limiter circuits allow isolation and amplitude adjustment of AC input signals to rectified DC output.

Sine waveinput

DCoutput

Rectifier CircuitTransformer

Half-wave Rectifiers

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Transformer and Rectifier Combination

Half-wave Rectifiers

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Follow the ElectronFlow through each Alternation. Note the Frequency (in) = Frequency(out)

Yellow = VoutRed = Vin

First Half Cycle

Second Half Cycle

Half-wave Rectifiers

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Follow the ElectronFlow through each Alternation. Note the Frequency (in) = Frequency(out)

Yellow = VoutRed = Vin

Full-wave Rectifiers

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Follow the ElectronFlow through each Alternation. Note2xFrequency (in) = Frequency (out)

Yellow = VoutRed1 = IsecondaryRed2 = Isecondary

Full-wave (Bridge) Rectifiers

Follow the ElectronFlow through each Alternation. Note: 2xFreq(in) = Freq(out)

Yellow = VoutGreen = VinRed = Vsecondary

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Full-wave (Bridge) Rectifiers

A closer look at the waveform illustrates that this is not a smooth,Consistant DC output. We can change this by adding a filter to the circuit.

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Full-wave (Bridge) Rectifiers

End of Rectifier Lesson

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