[sdiy] as3340 PW/tuning issue

[Jay Schwichtenberg]

Colin,

There has been a lot of talk and info on this in Muff Wigglers. Go there 
and do a search.

Seems that the different (manufactures) 3340s behave differently and 
from what I've seen the AS3340 is the worst. There are things that can 
be done to minimize the problem, that's been documented on Muff's.

Jay S.

On 12/18/2019 10:31 AM, ColinMuirDorward wrote:
> Hi folks,
>
> Was there ever a conclusive investigation of the PW/pitch interaction 
> on the as3340 chip? What I mean is that when you adjust the pw, you 
> get some detuning as well.
>
> I've never been sure if this was a bug in my circuit or the chip 
> itself. Also not sure if the other 3340 versions exhibit the same 
> behavior. I asked someone to test on their ms101 if that issue was 
> evident, and they said "no detune".
>
> I know that I'm not the only one experiencing this since alfa rpar 
> sells a module "for circuits where requirements on influence of PWM 
> signal on frequency are strict 
> <http://www.alfarzpp.lv/eng/sc/AS3340-HYB.php> "
>
> Any thoughts welcome.
>
> Cheers,
> Colin
>
> -- 
> https://www.instagram.com/colinmuirdorward/
> -
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