noniverting transistor amp

[Martin Czech]

> 
> 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.