noniverting transistor amp

[jorgen.bergfors at idg.se]

>> > I need to take a digital signal (5v) and convert it to 12v..
>> Is this possible to do with 1 transistor amp and maintain phase
>> relations/non-inverting?
>> > It *seems* like every amp I see is inverting.. > I guess maybe a darlington configuration would do this, but thats two
>> trannies..
>> 

>Hmm, common emmiter circuits (open collector) can give you any level you
>want (Uce max is the limit), but is inverting. An emitter follower is
>non inverting, but has gain <=1 , so no larger voltage output. Common
><<base cicuits may have a too low input impedance.  So: no, there isn't
>such a one tranny circuit. You need two common emmiter invertes in series.

>I think so, or am I wrong?
>m.c.

If you take a P-channel FET with the source tied to ground and the drain tied to +12V via a resistor and take out the signal at the drain. Wouldn't  that work?

/Jorgen