[sdiy] Saw vs Triangle Sync

[Magnus Danielson]

David G. Dixon wrote:
>> I would think the ability to choose between "Reset waveform" sync and
>> "Change direction" sync would only be available with a Tri core. Yes?
>> No?
>>
>> Tim (not sure whether I should be undecided... or not) Servo
> 
> Perhaps it should be "Tim Splunge" in this case, eh?
> 
> So, what you're saying is that, for a Tricore, one could either reset the
> trigger (as I do in my own designs) or reset the integrator by, what,
> putting a JFET switch across the cap as per the Sawcore, but only firing it
> with a sync pulse?  Hmmm...  Veddy intedestink!  One could even subtract the
> triangle voltage from the sync pulse to vary the opening of the JFET channel
> with an attenuator (just as I do with my sync circuits already).

Yes.

> Eck-tually... it wouldn't be all that hard to build a VCO which was
> either/or, now that I look at the circuitry of the two side by side.
> Definitely food for thought...

Read the article I just pointed you too... :)

Cheers,
Magnus