Hi everyone! @User and I have been working on OpenFASOC a fully open source analog block generation based on FASOC (https://github.com/idea-fasoc/fasoc) using fully open-source tools like OpenROAD, Magic and Netgen. So far, we have pushed an automated temperature sensor generator to github: https://github.com/idea-fasoc/OpenFASOC. Please have a look and try our generator and let us know if there are any issues. We would be happy to assist. Thanks!