Hi may i know what's the difference between using a RC and LC filters besides difference in components? Thanks a lot.

 

An LC filter has a steeper slope, because it has two 'active' components rather than just one. Generally you would use RC in an opamp filter, because it's far easier (and cheaper) to obtain resistors than high value inductors, and the opamp makes up for not using inductors. For a passive filter (crossovers etc.) you would usually use LC for the much greater performance.

What sort of filter are you asking about?.

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i am using it for RF filters (high pass and low pass)

 

RF filters will be LC, you wouldn't want to use an RC filter for RF, there's really no point!.

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Both inductors and capacitors are passive components, they are active in a sence that they both react to frequency.

As frequency goes up small inductors are used, so it is practical to use them in RF.

Active filters are always going to be better not only for the octave or decade slope, but are very tunable over passive filters.

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There is less power dissipated in a LC circuit than an RC circuit. RC is fine for filtering low power signals but when you are trying to filter a high power signal, like RF, LC is better suited.

 

thanks guys