[sdiy] Op amp for saw core VCO

[Harald]

OPA 134 is a good choice. I am in the process of re-designing the Elekto 
Formant VCO (Draft here: 
http://www.haraldswerk.de/NGF/NGF_VCO_CORE_ONE/VCO_CORE_ONE.html) and 
tried various OpAmps i have laying around (Tl051, 061, 071, 081, OP27, 
LF356...). OPA134 gives the best performance.
High impedance is needed for good low octave and high speed for good 
high octave performance.

Harald

http://www.haraldswerk.de/index.html

Am 26.10.2014 um 19:29 schrieb 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
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>