[sdiy] Simple discrete Unity-Gain Follower ?

[Michael Buchstaller]

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)

Could it be someting simple like:

                       +15V
                         ^
                         |
                         / E
                       |/
                 |-----|
                 |     |\
                 |       \ C
                 |       |
                 |       |
 Input ()--------|       |-------------()  Output
                 |       |
                 |       |
                 |       / E
                 |     |/
                 |-----|
                       |\
                         \ C
                         |
                         |
                         V
                        -15 V

I believe not, but maybe another simple circuit ?
Thank you all for thinking about it !


-Michael Buchstaller