Deriving Expression for Vout/Vi in Low Pass Filter

[Pixter]

Q: Derive an expression for the Vout/Vi, the ratio of the output and source voltage amplitudes, as a function of the angular frequencie W of the source.

The L-R-C circuits looks like this..



source(ac)----------capacitor-----inductor----resistor----(back to start)

Vout is taken "between" the source and resitor and between the capacitor and inductor.

A: Well i know som formula but I can't really identify anything or understand how to set-up the problem...

maybe someone could explain the problem in easier terms and maybe give me a push in the right direction.

Thanks

 

[George Jones]

So, this is a series circuit, with V_out = V_C, the voltage across the capacitor.

What do you know about the voltages across the individual components in a series circuit? The currents throught the individual components? The total impedance in terms of the impedances of the individual components?

Regards,
George