[sdiy] Simple discrete Unity-Gain Follower ?

[Czech Martin]

ok, good reason, 

perhaps this is a good starting point (european components).

http://www.geocities.com/SoHo/Museum/4459/circuits/headp.html

perhaps I'd leave away some of the electrolytics, or replace them.
Nice idea to have a DC coupled amp with some servo loop for
nulling output offset (not drawn).


m.c.



-----Original Message-----
From: Magnus Danielson [mailto:cfmd at swipnet.se]
Sent: Freitag, 2. Mai 2003 14:49
To: Czech Martin
Cc: buchi at takeonetech.de; synth-diy at dropmix.xs4all.nl
Subject: Re: [sdiy] Simple discrete Unity-Gain Follower ?


From: "Czech Martin" <Martin.Czech at Micronas.com>
Subject: RE: [sdiy] Simple discrete Unity-Gain Follower ?
Date: Fri, 2 May 2003 09:59:22 +0200

Martin,

> >So, I guess this is why op-amps got so popular, they save you a bundle of
> >headaches. However, a properly designed amplifier may very well be op-amp free,
> >no problems!
> 
> ... and it will have much of an op amp topology, the more accuracy you 
> need, the more it will look like a discrete op amp.
> So why not using the *right* op amp in the first place?
> 
> Why do you want to avoid an op amp at all cost?

He specifically asked for it, since he done an "all transistor" design he felt
he was cheating out. Just see it as an excuse to learn something new. It's DIY
for heavens sake, so he get's to decide how his designs looks and which border
requirements he has. If he would have asked for an all-tube solution that
would have been the topic, right?

Cheers,
Magnus