[sdiy] Saw vs Triangle Sync

[David G. Dixon]

> Soft sync is like hard sync with one key difference. Hard sync
> restarts the wave whenever there is a sync signal, period. Soft sync,
> however, requires the slave osc to be within a certain (variable)
> range of resetting, anyway. The result is that soft sync tends to act
> only when the slave's frequency is harmonically related to the master
> osc's frequency. Somebody posted pictures once, wish I could point you to
> them.
> 
> I would guess that soft sync can work with either saw or tri core.

What you describe (if I'm not mistaken) is what I do with all my VCOs,
simply by putting an attenuator on the sync input.  This varies the height
of the sync pulse which, if less than 5V (in my case), MAY OR MAY NOT reset
the oscillator, depending on the amplitude of the wave when the sync pulse
is presented.  That works on both core types.