Determine Vo for the following network.

[HebrewHammer]

Homework Statement

Determine Vo for the following network

[PLAIN]http://img535.imageshack.us/img535/7041/63014601.jpg.

Homework Equations

Too many to list I would think. I'm pretty sure I have to use KVL.

The Attempt at a Solution

My classmate told me the answer was 2.45V. I can't for the life of me get even close to this. I need some fresh ideas.

 

[trillebar]

There is a time-varying input voltage, so the output should also be time-varying. (At least in this case.) It could be useful to model the diode as a voltage source. You could use the principle of superposition to find the voltage over the resistor...

 

[HebrewHammer]

Think I got it,

Applying KVL

-20 + Vc - 5 = 0
Vc = 25V

The capacitor is charged up to 25 V.
Thevenin equivalent ckt of that portion of the network which includes Battery and resistor will result in RTH = 0Ω and ETH = V = 5V.

For the period t₂-t₃
Applying KVL
10V + 25 - v₀ = 0
v₀ = 35 V

What do you think?

 

[vk6kro]

Almost right.

You need to consider what will happen when the input changes.