[sdiy] VCO that goes SHARP in highest octaves??

Neil Harper metadata at gmx.com
Thu Jun 16 02:31:32 CEST 2022

On 6/15/22 09:48, Michael E Caloroso via Synth-diy wrote:
> Just a wild shot - did you check for oscillation on the line that
> supplies bias for high frequency compensation?

I scoped the output of IC2b and didn't see any oscillation, I also
completely disconnected the HF compensation (removing D1) and didn't see
any change in the problem.

I also replaced the reference voltage source (the -15V going through R43
(1.5M) with a -5V reference voltage going through a 470k resistor.
Scoping the -5V reference and I don't see any oscillation happening
there either.

/// Neil Harper
/// Every Wave is New Until it Breaks

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