[sdiy] exponential converter

[Magnus Danielson]

From: "Paul Perry" <pfperry at melbpc.org.au>
Subject: Re: [sdiy] exponential converter
Date: Mon, 6 Jun 2005 21:10:14 +1000
Message-ID: <000901c56a88$51f47940$0a01a8c0 at frostwave>

Paul,

> Magnus (or anyone else!), do you have a circuit for 
> going the 'other way'? I find there is more practical need for that,
> in  wanting to interface oct/v synths with the world.

I don't have a straight-forward (complete and detailed) schematic for it, but I
could synthesize one from the principle schematics that I have.

You could acheive almost the same thing by putting the Oct-2-Hz converter in
the feedback loop of an op-amp, which output would become the Oct output and
the positive input would be the Hz input. The negative input would be the
output of the Oct-2-Hz converter. Use a low-offset op-amp and you should be
fine.

Let's see if we can come up with a more direct form. I know there are such
things.

May I ask where you think that you need it? Give us some examples!

Cheers,
Magnus