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Diode Model

Question asked by rfdude on Dec 14, 2010
Hello,

I'm trying to characterise a diode and transfer the values to a model in ADS. I am using the "Diode_Model" and entered the saturation current, the emission coefficient and the temperature. The help of ADS says that these 3 values determine the DC behaviour of the diode.
But the resulting values differ a little from what you get when you enter the parameters in the "normal" diode formula.

i_D=8.194e-12*(exp(VDIODE/(1.815*25e-3))-1)

The attached image shows the two curves. [Edit: As the attachment doesn't work have a look at http://img547.imageshack.us/img547/6930/diode.png] Which parameters do i have to adjust to make the two curves congruent?

Thanks a lot for your time.  

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