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Home > Electronics Tutorial > The Diode Tutorial > Voltage Doubler Tutorial
The Diode - Electronic Tutorials

Voltage Doubler Tutorial

Voltage Doubler Circuit Diagram

It's best to read the page on the half-wave rectifier, first.

Point A is doing the opposite of point B.

As A increases in a positive direction, B increases negatively, and vice-versa.

Diagrams of Voltage Doubler

When A is positive, D1 is forward biased and charges C1 to the peak voltage, as in diagram 2.

D 2 is reverse biased and does not conduct.

When A goes negative, D1 is reverse biased and does not conduct.

D2 is forward biased and charges C2 to the peak voltage, as in diagram 3.

We now have two capacitors in series, each charged to the peak voltage.

The voltage across the load is. therefore, twice the peak voltage.

The voltage has been doubled.


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