[sdiy] Working with ASM1 VCO.. TEMPCO resistor Temperature compensation

[Jean-Pierre Desrochers]

Hi René,

>> Or just a voltage divider to get a final 18mV/oct to Q1 ?
>Yes. As long as the top resistor is much larger than the bottom, you should be fine.

Ok I understand. As stated I was thinking of a 33k for R9 instead of 56k.
This would be 33 times higher than 1k.
Still far enough ?


**************************************************************
-----Message d'origine-----
De : Synth-diy [mailto:synth-diy-bounces at synth-diy.org] De la part de René Schmitz
Envoyé : 20 janvier 2020 11:10
À : synth-diy at synth-diy.org
Objet : Re: [sdiy] Working with ASM1 VCO.. TEMPCO resistor Temperature compensation

Hi Jean-Pierre,

On 20.01.2020 16:54, Jean-Pierre Desrochers wrote:
> If I change the R9 value  from 56k to 33k for new design reasons
> will it affect the temperature compensation between the R14 TEMPCO and 
> Q1 ??
> 
> Is this R9/R14 ratio important temperature wise

No its not important. You will have to change the gain of the opamp, to 
get 1V/oct.

> Or just a voltage divider to get a final 18mV/oct to Q1 ?

Yes. As long as the top resistor is much larger than the bottom, you 
should be fine.

Best,
  René

--
synth at schmitzbits.de
http://schmitzbits.de
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