[sdiy] low Vbe transistors

[Magnus Danielson]

From: Keith Daniel <keith.daniel at sympatico.ca>
Subject: [sdiy] low Vbe transistors
Date: Mon, 15 Sep 2003 21:05:39 -0400

> >> > The question was what to do if the transistors available were not
> >> > matched and not low rbe. At least that's how I interpreted it.
> 
> >Actually, there is two parallel threads... one on how to compensate the rbe
> >out and another on how to find alternative sources of low rbe transistors.
> 
> 
> Perhaps you are talking about bulk emitter resistance, a common feature of any transistor in an exponential pair.

Yes, and it is often denoted

r
 BE

but it is easier to write rbe in ISO Latin 1.

> There are ways to trim out high end sag. 

Yeap, I in one of these threades there have been sufficient pointers the right
way on how to find out how to do that and for different methods.

The other thread is in a sense interesting, since it is about looking where we
might not have been thought about it, or at least it has not had wide knowledge
on where to look for trannies which could be a suitable selection.

Cheers,
Magnus