[sdiy] LM13600 VCO

[harrybissell]

I'll bet that if its a triangle core... the integrators would be OK in the same
package.  with a sawtooth core its likely to be trouble...

H^) harry

Jim Patchell wrote:

>         I suspect that even having the integrators in the same package could
> potentially cause problems, how much of a problem, I don't know...soft
> syncing is a fairly sublte problem...
>
> Scott Gravenhorst wrote:
> > That's what I thought too.
> >
> > Sitting here thinking about it, isn't the real problem due to the
> > schmitt trigger and not the integrator?  I then thought perhaps one
> > LM13600 and 2 single opamp packages might be workable as a dual VCO.
> >
> > Jim Patchell <patchell at cox.net> wrote:
> >
> >>      As far as making LFO's goes, I have had no trouble doing this.  The
> >>only question would be will the two oscialtors soft sync when their
> >>frequencies get close...for an LFO this is not an issue...I think.
> >>
> >>Scott Gravenhorst wrote:
> >>
> >>>I believe the answer to this one is "don't do it", but I'll
> >>>ask anyway:
> >>>
> >>>A tri/square VCO can be made using an LM13600, but one
> >>>amplifier is used as a schmitt trigger.  An opamp could be
> >>>used for the schmitt trigger.  Is it a bad idea to use an
> >>>LM13600 and an dual opamp to make a dual VCO?  I'm thinking
> >>>that there would probably be coupling problems that would
> >>>result in soft sync between the two VCOs.
> >>>
> >>>=========================================================
> >>>- Hydrogen is pointless without solar.
> >>>- Good or bad, that which gets rewarded, gets done.
> >>>- What good are laws that only lawyers understand?
> >>>- The media's credibility should always be questioned.
> >>>- Governments do nothing well, save collect taxes.
> >>>
> >>>-- Scott Gravenhorst | LegoManiac / Lego Trains / RIS 1.5
> >>>-- Linux Rex         | RedWebMail by RedStarWare
> >>>-- FatMan: home1.gte.net/res0658s/FatMan/
> >>>-- NonFatMan: home1.gte.net/res0658s/electronics/
> >>>
> >>>
> >>
> >>
> >>
> >
> > =========================================================
> > - Hydrogen is pointless without solar.
> > - Good or bad, that which gets rewarded, gets done.
> > - What good are laws that only lawyers understand?
> > - The media's credibility should always be questioned.
> > - Governments do nothing well, save collect taxes.
> >
> > -- Scott Gravenhorst | LegoManiac / Lego Trains / RIS 1.5
> > -- Linux Rex         | RedWebMail by RedStarWare
> > -- FatMan: home1.gte.net/res0658s/FatMan/
> > -- NonFatMan: home1.gte.net/res0658s/electronics/
> >
> >