[sdiy] 10 octave VCO circuit from EDN June 4 2025

René Schmitz synth at schmitzbits.de
Sat Jun 7 12:27:31 CEST 2025


On 07.06.2025 08:26, Paul Perry via Synth-diy wrote:
> https://tinyurl.com/57fd674d
>
Hmm, interesting to see NTC for temperature compensation, and (buffered) 
ARP style exponentiatior . Looks somewhat similar to my VCO4069.

That bidirectional current mirror is quite intriguing. I wonder how good 
the symmetry it is, and how well the transistors have to be matched.

Cheers,

  René

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