Wasn't there an GA FPGA design to distinguish two tones that was so weird and specific not only did it use capacitance for part on its work but literally couldn't work on another chip of the same model?
Yes, indeed, although the exact reference escapes me for the moment.
What I found absolutely amazing when reading about this, is that this is exactly how I always imagined things in nature evolving.
Biology is mostly just messy physics where everything happens at the same time across many levels of time and space, and a complex system that has evolved naturally appears to always contain these super weird specific cross-functional hacks that somehow end up working super well towards some goal
