[sdiy] LM13600 VCO

[Jim Patchell]

	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/
> 
>