I'm currently designing (or at least trying to) a RTD amplifier with ICL and current outputs.
What I've got so far is a working RTD and ICL schemes, but I still struggle to design a proper converter. The main issue is that the load impedance can reach up to 600 Ω. Input voltage range doesn't really matter, I can deal with that by adjusting my RTD, but as a complete amateur I have no idea how to design such a converter. I've already found one solution that I like on Stack Exchange, but even though in theory it should tolerate up to 1100 Ω, it clearly doesn't.
Here's a link to the topic I'm talking about:
Also, for the curious people (to actually confirm that I'm a complete amateur in electronics), here's what I've got so far: