[sdiy] Dual oscillator cores?

[Neil Johnson]

Hi,

David G. Dixon wrote:
> With my new 2164-expo VCO, I'm thinking that a triangle-core VCO  
> could be
> done very easily simply by switching the polarity of the
> reference-current-determining voltage

Yes, this exactly what I do in my VCLFO auxiliary triangle oscillator:

http://www.milton.arachsys.com/nj71/index.php? 
menu=2&submenu=0&subsubmenu=2

see IC5A, IC1C and IC6A, except in this case I'm not so concerned  
about temperature stability.

Cheers,
Neil
--
http://www.njohnson.co.uk