[sdiy] Op amp for saw core VCO

[Tim Ressel]

Hey,

So your standard sawtooth core VCO with the integrator and discharge FET. I am re-designing an existing product that uses a CA3130 as the integration amp and want to update it. What is a good modern amp for this application? Or if you prefer, what kind of amp is needed here? Precision? High speed? I have used an OP37 and an OPA602 with good results, but I am hoping for an inexpensive alternative.

Thanks!
Tim Ressel
Circuit Abbey
503-750-9331
timr at circuitabbey.com