[sdiy] GRP Genesi

[Michael E Caloroso]

My error - the VCO charged cap core is inside the feedback loop.

It is indeed a weird architecture - Jeremy Hill was really thinking outside
the box!

MC

On Sun, Jul 5, 2026 at 10:01 AM Mike Bryant <mbryant at futurehorizons.com>
wrote:

> Does it really even need the linear to exp convertor ?  The feedback loop
> will force it to the correct frequency.  Portamento could just use a
> different charging function on the capacitor.
>
> ------------------------------
> *From:* Neil Johnson <neil.johnson71 at gmail.com>
> *Sent:* 05 July 2026 10:26
> *To:* Michael E Caloroso <mec.forumreader at gmail.com>
> *Cc:* Mike Bryant <mbryant at futurehorizons.com>; SYNTH DIY <
> synth-diy at synth-diy.org>
> *Subject:* Re: [sdiy] GRP Genesi
>
> Michael E Caloroso wrote:
>
> US 3,930,429
>
>
> Don did a write-up of it here:
> https://till.com/articles/arp/patents.html#US03930429
> Very weird architecture indeed!
>
> Neil
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://synth-diy.org/pipermail/synth-diy/attachments/20260705/fad977ad/attachment.htm>