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Capacitor and Voltage Doubler 2

Basic construction of capacitor 3

Uses of capacitor 1-smoothing. 2-timing. 3-coupling. 4-Filtering 5-tuning 6-storing energy. 4

voltage doubler A voltage Doubler is an electrical circuit that converts AC electrical power from a lower Voltage to a higher DC voltage, typically using a network of capacitors and diodes. Voltage multipliers can be used to generate a few volts for electronic appliances, to millions of volts for purposes such as high-energy physics experiments and lightning safety testing. The most common type of voltage multiplier is the half-wave series multiplier. 5

Charging and Discharging curves 6

Example 1: Charging and Discharging curves Determine the capacitor voltage 50ʮs after the switch is closed if the capacitor is initially uncharged. R=8.2KΩ C=0.01ʮF Vs=50 V 7

Example 2: Charging and Discharging curves Determine the capacitor voltage at a point in time 6ʮs after the switch is closed. R=10KΩ C=2.2ʮF Vs=10 V 8

Circuit of Voltage Doubler 9

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