[sdiy] Tri to Saw converter produces a weird waveform

[Jonatan Liljedahl]

Just an idea: the first opamp is clipping due to common mode input voltage
outside range? TL072 on +/-12V only handles about -8 to +10 IIRC.

/Jonatan
http://kymatica.com


lör 13 dec. 2025 kl. 21:10 skrev Scott Bernardi via Synth-diy <
synth-diy at synth-diy.org>:

> I built a tri core vco and used a typical method to convert the triangle
> to a saw using the invert - noninvert of the triangle and adding the square
> back in.  Schematic and the waveforms I get are on this page:
> Weird Saw <https://www.bernacomp.com/elec/og2/weird-saw.html>
>
> Any ideas what's going on and how to correct it?
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