[sdiy] LM13700 Noise

[Tom Wiltshire]

There's a great paper on minimising *distortion* in the LM13700:

http://www.openmusiclabs.com/2015/10/my-summer-vacation-by-guest/trackback/index.html

It covers noise in passing, but you might learn something useful.

In short, I'd agree with Richie. Maximise the signal level, accept some distortion (just call it "warm analog character") and be sure to use a decent op-amp I-to-V convertor on the output not just a resistor to ground.

HTH,
Tom

==================
       Electric Druid
Synth & Stompbox DIY
==================




On 6 Jul 2017, at 12:51, Tim Ressel <timr at circuitabbey.com> wrote:

> Hi,
> 
> Does anyone know how to minimize noise in an LM13700 design? I've been playing with the balance between input level, control current, and output I/V conversion gain trying to minimize noise but with limited success. The datasheet doesn't seem to cover this.
> 
> Thanks!
> 
> -- 
> --Tim Ressel
> Circuit Abbey
> timr at circuitabbey.com
> 
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at synth-diy.org
> http://synth-diy.org/mailman/listinfo/synth-diy