Re: Ohm's Law

[David Bowman <David_Bowman@GEORGETOWNCOLLEGE.EDU>]

Regarding Van's question:
> I have a question about dV/dI.   ...
>  .....  So what is dV/dI?  You call it dynamic resistance, but how does it
> differ from regular resistance, especially when the two numbers can be quite
> different?
>
> Thanks.

The value of dV/dI (dynamical resistance) is the resistance seen by small
signal AC fluctuations about the DC bias.  That bias is found by the
intersection of the load line with the V(I) characteristic function (for
which the V/I quotient can be useful).

David Bowman
David_Bowman@georgetowncollege.edu