[sdiy] LM13700 Noise

[paula at synth.net]

As Richie says, Always use the diodes with a bias.
It'll never be as quiet as dedicated VCAs, but it's also a LOT cheaper 
:)

Paula

On 2017-07-06 13:14, Richie Burnett wrote:
> Use the linearising diodes with the bias current that they recommend
> in the datasheet, because they let you drive the inputs harder for a
> given amount of distortion, and a hot input signal improves SNR. Then
> drive the inputs with the largest amplitude signal that you can get
> away with that yields acceptable distortion. Then live with the
> resulting SNR / distortion performance, or switch to a better chip.
> That's all there is to it, as far as I know.
> 
> -Richie,
> 
> Sent from my Xperia SP on O2
> 
> ---- Tim Ressel 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
>> 
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