DIY Electronics Question

[Tony Hardie-Bick]

Ahh... No.

You have the concept right, but the implementation is done using a buffer, aka op-amp unity gain follower, and or selecting appropriate output impedance. Check out some basic op-amp mixer circuits. Once you've got that clear, the rest will follow.

Tony (HB)

punkdISCO <forums at punkdisco.co.uk> wrote:

>Hi all
>
> 
>
>Ive been doing some pretty sexy stuff with a Korg 800dv.  Firstly I
>installed an Analogue Solutions CV kit - to be honest, this was way too
>expensive for what it gives you especially once you realise what it
>does not
>so.  So, I decided to modify the kit and it is all working fab apart
>from
>this:
>
> 
>
>The 800dv is two voice so there are 2 sets of CV/Gate + 2 sets of LPF
>CV and
>HPF CV.  I wanted the sockets to control both voices if only 1 set of
>sockets are installed.  This works great BUT, the connection between
>the
>filter CVs flows in both directions (obviously which means even when
>there
>is no external CV control, the second filter controls the first filter.
> Its
>complicated to describe but I know how to fix it:
>
> 
>
>Question: for a CV circuit, if I want CV to flow in one direction and
>not
>the other, would a diode do this?  If so, what sort of rating do I
>need?
>
> 
>
>Thanks for any pointers..
>
> 
>
>Paul
>
>London
>
>www.punkdisco.co.uk
>
> 
>
> 
>
>
>
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