[sdiy] JX-3P question

[Oren Leavitt]

I was thinking same - rectified/filtered DC level of noise feed back to 
OTA gain control acts like a compressor to give noise output a steady 
amplitude. Seems this eliminates the need for gain trim due to variances 
in noise transistors, too.

On 1/18/26 11:13 AM, Richie Burnett wrote:
> Can anyone confirm what IC3 (BA662 OTA) is doing in the Noise Generator part
> of the JX-3P schematic attached?
> 
> At first I thought it was to allow the noise level in a patch to be
> adjusted, but on closer inspection it looks like the OTA is in some sort of
> local feedback loop, intended to keep the noise amplitude constant, maybe?
> 
> -Richie,
> 
> 
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