Sean Breheny wrote:
>
> Hi all,
>
> At 06:29 PM 8/25/98 -0700, you wrote:
> >on. On, it's resistance is about .6 Ohms. The source must be more
> >negative than the drain, as the mosfet simply conducts, switched on or
> >not, when hooked up the other way.
>
> I might be wrong, but I don't think that this is exactly correct. AFAIK,
> all fets are pretty symetrical when it comes to the source and drain.

These MOSFET's have an inhearent reverse diode in them, so that they
conduct when connected in reverse. As far as I know, all the big ones
do. Sometimes the schematic symbol shows this diode, sometimes not.

Keep in mind, though, that a MOSFET when on is a resistance, and not a
junction drop. In this case, the on resistence is .6 OHMS, a number not
at all related to a .6 VOLT junction drop.

Russell Hedges