A low-pass filter is a circuit that allows low-frequency very easily and does not allows high-frequency easily. There are two basic kinds of circuits
The capacitor's impedance decreases with increasing frequency. This low impedance in parallel with the load resistance tends to short out high-frequency signals.It drops most of the voltage across series resistor R1
The inductor's impedance increases with increasing frequency. This high impedance in series tends to block high-frequency signals from getting to the load.
By Conclusion,
In this case,the inductive low-pass filter is very simple in structure. The capacitive version of this filter is not that much more complex, with only a resistor and capacitor needed for operation. Due to its complexity, capacitive filter designs are generally preferred over inductive because capacitors tend to be “purer” reactive components than inductors and therefore are more predictable in their behavior. By “pure” I mean that capacitors exhibit little resistive effects than inductors, making them almost 100% reactive. Inductors, on the other hand, typically exhibit significant dissipative (resistor-like) effects, both in the long lengths of wire used to make them, and in the magnetic losses of the core material. Capacitors also tend to participate less in “coupling” effects with other components than inductors, and are less expensive.
courtesy:allaboutcircuits.com
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1.Capacitive low-pass filter
The capacitor's impedance decreases with increasing frequency. This low impedance in parallel with the load resistance tends to short out high-frequency signals.It drops most of the voltage across series resistor R1
The response of a capacitive low-pass filter falls off with increasing frequency.
2.Inductive low-pass filter
The inductor's impedance increases with increasing frequency. This high impedance in series tends to block high-frequency signals from getting to the load.
The response of an inductive low-pass filter falls off with increasing frequency.
In this case,the inductive low-pass filter is very simple in structure. The capacitive version of this filter is not that much more complex, with only a resistor and capacitor needed for operation. Due to its complexity, capacitive filter designs are generally preferred over inductive because capacitors tend to be “purer” reactive components than inductors and therefore are more predictable in their behavior. By “pure” I mean that capacitors exhibit little resistive effects than inductors, making them almost 100% reactive. Inductors, on the other hand, typically exhibit significant dissipative (resistor-like) effects, both in the long lengths of wire used to make them, and in the magnetic losses of the core material. Capacitors also tend to participate less in “coupling” effects with other components than inductors, and are less expensive.
courtesy:allaboutcircuits.com
Hardwork Can Never Ever Fails...
Best Luck...
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