[sdiy] LM13700 as VC resistor

Youssef Menebhi youssef.menebhi.79 at gmail.com
Sat Feb 8 16:46:09 CET 2020


I breadboarded the application notes schematics at some point and had
no luck with it, either. I'd be curious to know more about this.



On Sat, Feb 8, 2020 at 5:02 AM Didier Leplae via Synth-diy
<synth-diy at synth-diy.org> wrote:
>
> I am curious to know anyone’s opinions on using the LM13700 as a voltage controlled resistor.
>
> The LM13700 datasheet has a couple schematics which I have tried building, with mixed results. I’m having a hard time knowing what sort of resistance I am getting as the multimeter gives strange and inconsistent readings.
>
> The information on the datasheet is somewhat incomplete in my opinion and it is not easy to find much info online either.
>
> It doesn’t seem like it is common practice to use these as VC resistors. Is that because it doesn’t work very well? Or use too many parts?
>
> Any insight on this would be appreciated.
> I’m interested mostly in the single ended schematic at the moment.
>
> Thank you,
>
> Didier
>
>
>
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