[sdiy] Buffering Busses?

[Seb Francis]

Richard Wentk wrote:

> At 13:38 28/12/2005, Dave Kendall wrote:
>
>> OK seems worth the extra money. Would just the one OPA on the 1V/OCT 
>> output
>> be sufficient to feed up to 8 VCOs? I haven't yet found a really good 
>> buffer
>> design, and was planning on using just a simple voltage follower. Do you
>> know of a schemo anywhere, perhaps with provision for trimming any input
>> offset?
>
>
> If you put a voltage follower on the original output it will solve 
> your buffering problems. That way you only need one rather than having 
> one for every input.
>
> You don't need super-instrumentation amps. Anything will do. It's the 
> kind of thing you could use a 741 for.
>
I don't agree here .. the opamp input offset voltage vs temperature is 
an important consideration.  As is the input offset voltage itself if 
you have a MIDI to CV converter with multiple outputs but only 1 output 
offset trimmer.

Seb