SV: Re: [sdiy] OTA VCO bad or not!

[karl dalen]

--- mark verbos <mverbos at earthlink.net> skrev:

> The triangles sometimes come out asymmetrical. The problem I have found 
> is no way to trim them.

A small DC level at OTA input sets triangle symetry.
A small DC level at comparator sets triangle output DC shift.

> If you build a discrete OTA, like the Buchla 
> ones, you can match the transistors and put a trim at the top. Plus, if 
> you use discrete transistors, you can use an NPN expo converter.

There is a bonus in NPN yes.

KD