Finding reverse sat current of pn junction diode

AI Thread Summary
To determine the reverse saturation current of a pn junction diode, it's essential to analyze the IV characteristics graph, which typically only shows positive forward bias values. The reverse saturation current cannot be directly observed from forward bias data (0-0.8V) since it requires reverse bias conditions (V < 0V). The ideal diode current density formula may be applicable for calculations, but without reverse bias data, the reverse saturation current remains indeterminate. A general equation for the diode's IV characteristics could aid in further analysis. Understanding these points is crucial for accurately finding the reverse saturation current.
ralph13
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Homework Statement


Determine reverse sat current of diode. To show and explain approach. Given-IV characteristics of diode and tabulated values for forward bias voltage from 0-0.8v and corresponding current values.


Homework Equations


At which point do I need to consider to find the reverse sat current


The Attempt at a Solution


using formula of ideal diode current densityfor an abrupt pn junction diode??
 
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it's been a while since I've done diode problems... but from the IV characteristics graph, can't you determine the reverse sat current from the graph? not sure if forward bias voltages help, because you need the diode to be reverse biased (V < 0V) to see reverse sat current... did that help? or maybe I'm just not understanding your question..
 
Welcome to PF, ralph13.

If you are only given or shown the i-v for positive values, between 0 and 0.8V, that rules out a direct observation.

Do you have a general equation for a diode's i-v characteristic?
 

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