[sdiy] Adding offset to vactrol??

[Ian Fritz]

At 01:13 PM 6/3/2008, Tom Wiltshire wrote:

>You're trying to get the pitch of the 4024 square output turned into
>a pitch CV, right?
>
>If you've tried this with a LM2917 and found it wanting, I'm afraid
>you're unlikely to do better with anything based on a vactrol. There
>may be other chips available that would do a better job for audio
>than LM2917, but I'm afraid I don't know of any. Perhaps someone else
>has more experience with Freq-to-voltage ICs?

The LM331 is *very* accurate, and there are various circuits in the data 
sheet and app notes.

Ian