please explain
please explain
(OP)
how can i predict the volt drop across a diode for a given current through it whilst forward biased. i ask the question because i am working with a drive that has an analogue reference that has a diode in series with it the refernce signal varies from 0-5v.h measurment i can see that the volt drop across the diode varies between 0.4 and 0.2v depending on the applied voltage





RE: please explain
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Sometimes I only open my mouth to swap feet...
RE: please explain
The basic equation looks something:
I = Is*exp(Vs/Vt) where Vt = kt/q
If you already have a couple of points, you can fit the equation.
Earlier, I said "carefully," since the current flow affects the temperature of the diode, which affects Vt.
TTFN
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RE: please explain