Doepfer

I was thinking, there should be space for a jack, so why not make it  
so that the slew circuit could be used, so why not? You always need  
another slew limiter!
On Feb 24, 2009, at 13:54:18, selfoscillate wrote:

> --- In Doepfer_a100@yahoogroups.com, "Doug" <dougc356@...> wrote:
> >
> > I thought of it more as a means processing the CMP out signal  
> upstream
> > of the LPF, for example, coming up with an alternative cmp  
> strategy. I
> > suppose if the LPF is just a mini A-171, then one could just bypass
> > the entire LPF as you suggest and use the A-171 instead.
> >
> > I am still mystified as to why the LPF output leads to smooth output
> > from the internal VCO, but causes jitter when going to an alternate
> > VCO. It's as though the internal VCO has a built in slew or  
> something.
> >
>
> hello dough,
>
> i find that the a196 manual explains it quite well.
> the phase comparator in the a196 generates a digital
> signal, which is used to drive a linear vco.
> the lowpass filter is there to smooth out this
> digital signal and make it less jumpy, which leads
> to a more stable vco output. since other vco's are
> controlled in a different way (not by a digital signal,
> but a continuous analog voltage), you won't get the same
> results with "normal" vco's like a110 or a111. inserting
> a lowpass filter at a different position in the pll would
> just compromise the function of the module.
> somebody please correct me if i'm wrong here.
>
> best wishes
>
> ingo
>
>
> 



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