# filter circuits

Discussion in 'Electronics Homework Help' started by andrewllewop, Oct 13, 2012.

1. ### andrewllewop

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Oct 13, 2012
hey just need to know if in a circuit that contains both an inductor and a capacitor if the ripple decreases or increaases in comparison with a circuit with a single inductor or capacitor

7,682
1,686
Jan 5, 2010
Depends.

Bob

3. ### andrewllewop

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Oct 13, 2012
it depends on what exactly.

4. ### (*steve*)¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥdModerator

25,448
2,809
Jan 21, 2010
It depends on how they're connected.

How are they connected?

Does the change involve adding an inductor to an existing circuit, or substituting an existing C with a new C and an L?

5. ### (*steve*)¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥdModerator

25,448
2,809
Jan 21, 2010
It depends on whether it's homework or not.

Mostly it depends on whether after wasting time in a duplicate thread, we want to waste more time. Don't post multiple threads.

6. ### andrewllewop

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Oct 13, 2012
The circuit initialy used a capacitor and then an inductor was introduced afterwards

7. ### andrewllewop

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Oct 13, 2012
Let me describe it a little better.
Initially it is a single capacitor, then an inductor was introduced connected directly in series with the load. Afterwards another capacitor was introduced after the inductor connected directly to the load. There was no replacement of any components only addition

8. ### (*steve*)¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥdModerator

25,448
2,809
Jan 21, 2010
Consider the short term and long term response of each element to both a change in voltage or current (as appropriate)

Consider them in isolation first.

9. ### Laplace

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Apr 4, 2010
How much ripple was there in the circuit with the single inductor or capacitor?