>>2954129
>can i get a clear confirmation from you that this circuit is a pedagogical exercise please?

Yes, I'm mainly building this for learning purposes, not because I expect it to be at all good.The circuit is from this article (pic)

https://blog.thea.codes/the-design-of-the-juno-dco/

it definitely works in my hands (and you can see from this pic that I've accidentally flipped my own op amp). The "clock" signal discharges the integrator via the transistor.