<div dir="auto"><div>Hi Rutger,<div dir="auto"><br></div><div dir="auto">The CESYG Dualfo sync circuit on the aux oscillator does two things: reset the integrator capacitor, and force the window comparator into the negative state so that the next cycle starts at 0 degrees in the sine wave sense. </div><div dir="auto"><br></div><div dir="auto">Neil</div><br><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat, 9 Mar 2019, 07:45 Rutger Vlek, <<a href="mailto:rutgervlek@gmail.com">rutgervlek@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Dear list,<br>
<br>
I’m working on a triangle and square wave LFO, based around an integrator and window-comparator and would like to reset the phase of the triangle (and derived waveforms) with a trigger event. I’ve simulated (Spice) to w common technique to short out the integrator capacitor with a JFET, but that of course only resets to 0V, while my triangle is moving between +5V and -5V. Ideally, I’d like to choose which of these voltages to reset to. Any tips on how to implement something like that? It’s important for me to maintain stable temperature/tuning of the LFO frequency as I will use it to modulate things at audio rate as well, and prefer to keep a stable timbre as the result.<br>
<br>
Regards,<br>
<br>
Rutger<br>
<br>
<br>
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