Engineering Diode circuit with AC excitation source

AI Thread Summary
The discussion focuses on analyzing a diode circuit with an AC excitation source, specifically the output voltage (Vout) when the input voltage (Vin) is applied. When Vin is positive, the left diode becomes forward biased and conducts, while the right diode is reverse biased and does not conduct. The capacitors in the circuit do not charge to the same voltage due to their series configuration, which affects the overall voltage behavior. The conversation emphasizes the importance of correctly redrawing the circuit to reflect these conditions and understanding the potential divider concept. Overall, the analysis clarifies the conditions under which the diodes operate and their impact on Vout.
Gbox
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Homework Statement


Graph ##V_{out}##
0wGEWB8.png


Homework Equations

The Attempt at a Solution



When ##V_{in}=V## C1 is positive on the left and negative on the right, and C2 is negative on the the down side and positive on the upper side so there is no Vout?
 
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Gbox said:
When Vin=VVin=VV_{in}=V C1 is positive on the left and negative on the right, and C2 is negative on the the down side and positive on the upper side so there is no Vout?

That's not correct.

For the moment let's assume that V is much greater than the forward voltage of the diode...

When Vin = +V the right hand diode is reverse biased (not conducting) so that can be temporarily removed. The left hand diode is forward biased (conducting) so replace it with a wire. Redraw the circuit to show this.

Then... Are you familiar with the "Potential Divider" circuit?
 
CWatters said:
That's not correct.

For the moment let's assume that V is much greater than the forward voltage of the diode...

When Vin = +V the right hand diode is reverse biased (not conducting) so that can be temporarily removed. The left hand diode is forward biased (conducting) so replace it with a wire. Redraw the circuit to show this.

Then... Are you familiar with the "Potential Divider" circuit?
Why is the left hand diode is conducting? the capacitors do not affect the voltage? do not they both charge to the same voltage and the diode is not conducting?
 
No they don't charge to the same voltage (unless they are same value). The two caps are in series.
 
This is what the circuit looks like when Vin transitions from 0 to +V (assuming +V >> Vd)...

Caps.jpg
 

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