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

[mskala at northcoastsynthesis.com]

On Sat, 6 Aug 2022, Mike Bryant wrote:
> I wonder if a CMOS equivalent to an OTA could be designed with CMOS
> transistors and an input resistor ?  Any thoughts ?

I've seen mention of it in academic papers, e.g.
   https://uhra.herts.ac.uk/handle/2299/9555

It doesn't seem like there'd be any reason a CMOS OTA would be hard to
build.  An OTA is not much different in structure from a current-mirror op
amp and those are routinely built in CMOS; and the authors of that paper
claim to have done it at least in simulation.

-- 
Matthew Skala
North Coast Synthesis Ltd.