[sdiy] Can google's free* 180nm OSHW foundry be used for synth parts?

[Peter Pearson]

What are you going to make with 64 OTAs on a chip?  Just curious.

On Fri, Aug 5, 2022 at 2:20 PM cheater cheater via Synth-diy <
synth-diy at synth-diy.org> wrote:

> Google are running a program where if you submit open source chip
> designs they'll produce them either cheaply or for free on a 180 nm
> process.
>
> "We sponsored six shuttle runs over the course of two years, allowing
> the open source community to submit more than 350 unique designs of
> which around 240 were manufactured at no-cost."
>
> Is this a process that could be used for analog synth parts? We could
> use new OTA chips, and I think I wouldn't mind a chip with 64
> monolithic OTAs on it, or chips with full voices, etc. With this
> feature size, leaps and bounds beyond the last time synth chips were
> being miniaturized, we could go wild with designs.
>
> Apparently they already have solutions for on-chip passives, single
> transistors, and relatively "high" voltages (10V), so the next
> question is how they would handle something like an OTA, VCA, op amp,
> etc, since most users seem to be focusing on digital chips.
>
> "The GF 180nm technology platform offers open source silicon designers
> new capabilities for high volume production, affordability, and more
> voltage options. This PDK includes the following standard cells:
> - Digital standard cells libraries (7-track and 9-track)
> - Low (3.3V), Medium (5V, 6V) and High (10V) voltage devices
> - SRAM macros (64x8, 128x8, 256x8, 512x8)
> - I/O and primitives (Resistors, Capacitors, Transistors, eFuses)
> cells libraries"
>
>
> https://www.phoronix.com/news/Google-GloFo-GF180MCU
>
>
> https://opensource.googleblog.com/2022/08/GlobalFoundries-joins-Googles-open-source-silicon-initiative.html
>
>
> If we can figure out how to take advantage of that, synth chips could
> become very interesting.
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