This can probably be had in a single patch- or close enough at least. But depends what instrument you want to do it on. On the Modor NF1 I'd just use the "sonor" wave shape on osc 1, then slowly add in a second oscillator and slightly fade up the pitch. On P12, same deal, but for the wave form just work with your noise and a little res. Add some tuned chorus perhaps. Important part is that main meat of it is a "noisy" waveform.