Capacitors are used to store electrical energy, although they cannot increase the voltage on their own.
By connection, the energy of a capacitor can be described in terms of the work done while charging it. The two concepts are related because energy storage on a capacitor requires immense effort against the electric force to move the charge from one capacitor plate to another. Capacitors are used to store electrical energy, although they cannot increase the voltage on their own.
The voltage multiplier circuit is made by connecting a capacitor and a diode. In many circuits where the output voltage must be greater than the input voltage, capacitors can be used. The output DC voltage is increased by adding capacitors to the full-wave and half-wave rectifiers.
A voltage multiplier circuit may be used; This generates an output voltage that is several times greater than the supplied input voltage. You can effectively multiply this input peak voltage to produce a DC output that is some odd or multiple peak voltage values of the AC input voltage by combining the rectifier diodes, which allow an electric current to travel only one way. Allows to do, and capacitors.
For example, a voltage multiplier circuit with a voltage multiplier factor of two is called a voltage doublure. The circuit consists of only two diodes, two capacitors, and an oscillating AC input voltage. Together, the diode and capacitor essentially double the voltage.
A diode is forward biased and charges the capacitor to the peak value of the input voltage during the negative half-cycle of the sinusoidal input waveform. Capacitor when fully charged acts as a storage device in series with the voltage supply as it has no return path to discharge. At the same time, is charged by the diode as it conducts through . While the diode is the forward-biased recharging capacitor during the positive half-cycle, the diode prevents the discharge of the reverse-biased.
However, because the capacitor already has a voltage equal to the peak input voltage, the capacitor is charged to twice the peak voltage of the input signal. charges to on the negative half-cycle, while connecting the AC peak voltage to on and transferring it to on the positive half-cycle. In preparation for the following half-cycle, the voltage across the capacitor discharges through the load. Since this is the peak value of the input voltage, we can calculate the voltage across the capacitor, as follows: = 2 (the voltage drop across the diode employed). A cascade of "N" doubles will theoretically result in an output voltage of 2N. volts and, theoretically, any required level of voltage multiplication can be produced