Diode Current & Output Voltage Calculation with V(1)=10 V and V(0)=5 V

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To determine the current through each diode and the output voltage Vo given V(1)=10 V and V(0)=5 V with a diode threshold of 0.6 V, the discussion emphasizes the importance of analyzing diode states by checking the voltages at their anodes and cathodes. It suggests starting with the highest potential sources to assume certain diodes are on and then checking for contradictions in the circuit. Participants noted errors in the equivalent circuit diagram, including missing resistors and the distinction between Vo and V(0). The conversation highlights the need for careful attention to circuit details and confirms that the suggested approach is valid. The overall focus is on accurately calculating diode currents and output voltage in the given circuit configuration.
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Homework Statement


If V(1)=10 V and V(0)=5 V, and the voltage threshold for all diodes is 0.6 V. Determine the current through every diode and the output voltage Vo if V1=V4= 5V and V2=V3=10 V.
001.jpg

Homework Equations


Basic KCL & KVL.

The Attempt at a Solution



I know that the basic idea to determine whether the diode is on or off is by assuming one state and then confirm it. The thing is I could do that with two or three diodes at most. but I know another to determine its state which is done by determining the voltages on both the anode and the cathode separately. And that I what I was going, but I couldn't determine some voltages like VA and VB in the following figure:
002.jpg


Any help?
 
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Certain diodes being turned on will dominate things. Once a diode is on it will effectively "clamp" the potential to one diode-drop from the source that's driving that current. So look for the highest potential sources first and assume their diodes are on. See what that would imply for the others (look for contradictions).

In your equivalent circuit diagram you seem to have "lost" a 5k resistor, and the 10k resistor seems to have become a 1k resistor. You also left out the 5V source for Vo.
 
gneill said:
You also left out the 5V source for Vo.
There is no 5V source at Vo. Vo is our output.

Vo is different from V(0). :smile:

V(0) = 5V is just telling us that for this gate, LOGIC LOW is approx 5V
 
NascentOxygen said:
There is no 5V source at Vo. Vo is our output.

Vo is different from V(0). :smile:

V(0) = 5V is just telling us that for this gate, LOGIC LOW is approx 5V
Ah. I should have spotted that. Thanks.

My suggested approach still applies though.
 
Looking good.
 
Thanks. I really appreciate your help. :)
 

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