[sdiy] Simple discrete Unity-Gain Follower ?

[fmg]

Michael Buchstaller wrote:
> 
> Hello Friends,
> 
> i am looking for a simple circuit t decrease the output impedance
> of my synth modules.
> OK, i can just use an Opamp with the "-" input tied to the output to buffer
> the signal, but i would like to make a discrete transistor output stage.
> An Emitter follower won´t do because of it´s Offset and unequal push/pull
> currents.
> 
> Any ideas or pointers to a simple solution ?
> 
> It needs not to deliver lots of current, but should be capable of driving several
> 600 Ohm inputs in parallel. (say: 150 Ohms input impedance)
> 
This goes to Douglas Self's website:

http://www.dself.demon.co.uk/webbop/opamp.htm

See "Driving heavy loads" at the end of page.
I hope it gives you some help.

Fabio Gonzalez