Rectifier with capacitor-filter

 ·         Rectifier with capacitor-filter

–        Electronic filters are electronic circuits which performs the function of removing unwanted signal.

–        Resistors, capacitors and inductors are used for the construction of filter circuits.

–        As output of rectifier circuit contains some AC component, so to remove this unwanted AC component, capacitive filters are used.

–        Capacitve filter circuit consists of a resistor and capacitor as shown in fig.

–        The function of this filter is to remove AC component and give pure DC voltage.

–        The output voltage of this filter still contains some AC component which is known as ripple.

OR       


Working: As we know the property of capacitor that it blocks D.C. and allows to pass A.C. through it. Here in this circuit capacitor is connected in parallel with the rectifier output because of this, the A.C. signal of the rectifier o/p passes to the ground through the capacitor and the remaining D.C. signal appears across load resistor RL( as D.C. is blocked by the capacitor)

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