[sdiy] using LM13700 in differential mode to reduce trimmers

[Roman Sowa]

How can differential input do anything with internal LM13700 offset? 
It's still there. Nothing changed.

Roman

W dniu 2020-10-25 o 22:00, Eric Schlappi pisze:
> Hi All,
>
> I've been experimenting with adding an inverting op amp and driving my 
> LM13700 (and other OTA circuits) differentially, which seems to let me 
> drop the traditional offset trimmer. I am also using precision thin 
> film resistors, which might help too.
>
> Anyone else been down this path with positive or negative results?
>
>
>
> Thanks,
> Eric
>
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