Solving RC Circuit Voltage: Find Vn

[likephysics]

Homework Statement

Find Vn in the attached ckt.

Homework Equations

The Attempt at a Solution

C12 & C2G act as capacitive voltage dividers. But I don't know how to account for R in parallel with C2G.

 

[Antiphon]

There are at least three mathematically distinct approaches to solving this. What technique are you supposed to use?

 

[likephysics]

There are at least three mathematically distinct approaches to solving this. What technique are you supposed to use?

Any technique that works.
I'd prefer KVL.

 

[likephysics]

Anyone?

 

[gneill]

If V1 is an ideal source, then C1g is irrelevant (except for the added current it will draw from the voltage source, it won't have any effect on the voltage delivered to the remainder of the circuit).

Why not remove the load resistor and determine the Thevenin equivalent of the rest? When you then add back the load you'll have a voltage supply and RC voltage divider to analyze (note that the Thevenin voltage will be frequency dependent unless V1 has a given fixed frequency).

 

[likephysics]

If V1 is an ideal source, then C1g is irrelevant (except for the added current it will draw from the voltage source, it won't have any effect on the voltage delivered to the remainder of the circuit).

Why not remove the load resistor and determine the Thevenin equivalent of the rest? When you then add back the load you'll have a voltage supply and RC voltage divider to analyze (note that the Thevenin voltage will be frequency dependent unless V1 has a given fixed frequency).

Thanks. I got it. It's so simple, if C1g is ignored.