Re: [sdiy] JX-3P question
2026-01-18 by 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.
Show quoted textHide quoted text
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, > > > -- > This email has been checked for viruses by AVG antivirus software. > www.avg.com________________________________________________________ > This is the Synth-diy mailing list > Submit email to: Synth-diy@synth-diy.org > View archive at: https://synth-diy.org/pipermail/synth-diy/ > Check your settings at: https://synth-diy.org/mailman/listinfo/synth-diy > Selling or trading? Use marketplace@synth-diy.org