Re: An Absolute Beginner With A Few Questions

On Tue, 13 Dec 2005 19:46:55 -0600, via <dnntk3$c9$1@xxxxxxxxxxxxx>,
"Pete Holland Jr." <peterg@xxxxxxx> spake thusly:

>when it gets to transistors, it says
>the electrical path is emitter to collector or emitter to base.

Missed this bit the first time. It's wrong if stated as you say.
Here's kinda how it works: A potential is developed between collector
and emitter, but there is no current because of a phenomenon called
the "depletion region," which is a transistor's way of resisting
current. The emitter flow (either "electron" or "hole" flow) wants to
move to the collector, but is impeded by the depletion region.

A potential is applied at the base in order to influence the depletion
region to shrink, until finally it is small enough to allow energy to
pass from emitter to collector. However, the energy injected at the
base also flows to the collector. Again, based on type, NPN or PNP,
the transistor changes the type of flow from "electron" to "hole."

Well, you asked for it, so there it was! Check this:

http://www.tpub.com/neets/book7/25a.htm

.

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