DIY parts

[Ian Fritz]

Jeurgen --

Are the Korg schematics up anywhere? I don't recall running into them.
Thanks.

  Ian

jhaible wrote:

> (2) You can use an extra transistor for a cascode configuration
> if you want to keep the cb voltage of the expo converter's transistor
> low. This will also help making a high output impedance.
> Korg used an extra FET for this cascode configuration in some of
> their VCOs. (Expo converter from dual npn, output drives FET with
> base grounded, discharge circuit is a thyristor built from discrete
> npn's and pnp's, and buffer is another FET.
> I do *not* know how good this performs, but I thought I should mention it.