The principle of capacitor filtering is that the capacitor is used to store energy during the conduction of rectifier diode, and release energy during the shutdown to make the output voltage relatively stable. On the one hand, filter to reduce the ripple component of the output voltage as much as possible, on the other hand, store the DC component in the output voltage as much as possible to make the output voltage close to the output voltage of the ideal DC power supply.<br>
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