Best emitter / source / cathode follower topology - Page 3

2nd November 2007, 11:57 AM

#21

Alex M

diyAudio Member

Join Date: Apr 2001

Location: Hampshire, UK

Quote:

Originally posted by borges
That looks like a nice place to start! However, I would probably drop the passive filter and opamp after the follower. Do you know if the follower itself has the ability to drive a line output?
Borge

I am intending to use only the "SLCF" part of the circuit on Pedja's site, as I think the filter was found necessary for the amplifier chip.

The output impedance of a simple source follower is is approximately 1/gm, or about 40 ohms for a2SK170, which is pretty low in this context .

Alex

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