SV: Re: SV: Re: [sdiy] VCO autotune for poly analog modular

[Antti Huovilainen]

On Fri, 6 Apr 2007, karl dalen wrote:

> I thought you understood my indirect sugestion?

> Anyhow, you do need high resulution and also high
> accuracy especially for the low freq range

High resolution and differential linearity yes, accuracy no.

> *Static* DC and gain can be large but not huge!
> Unfortunately they are *temperature and code* dependent.

Code dependency goes to nonlinearity = lower resolution (I did 
say high resolution). As for temperature, the whole idea is based around 
autotune so any temperature dependency would be cancelled. The main point 
is that you do not need very good offset or gain accuracy (which cost).

> Even a ancient MCU would do, i don't see the reason why the wouldn't?

You'd have trouble calculating all the modulations at > 1 kHz rate for 
multiple VCOs.

Antti

"No boom today. Boom tomorrow. There's always a boom tomorrow"
   -- Lt. Cmdr. Ivanova