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At 16:08 11/8/99 -0800, Leigh wrote:signal
dV/dI is the important quantity for evaluating the effect of small
voltages which oscillate about some DC bias value.
In the olden days it was dI/dV, the transconductance,
which served this function.
Leigh
Indeed, if you believe Horowitz & Hill, the bipolar transistor's
collector current is determined by the base emitter *voltage*.
They cite the Ebers-Moll relation to support the transistor's function
as a transconductance device.
(It was a slightly modified Ebers-Moll expression which was displayed
earlier in this thread in describing the exponential behavior of the
semiconductor diode.)
brian whatcott <inet@intellisys.net>
Altus OK