First author of the paper here. That's it indeed! One thing is that this is entirely CMOS-compatible. You could also do something similar with optics or other platforms, but we chose electronic circuits for this reason specifically.
By that remark I meant "digital CMOS," in the sense of elements that store state information discretely in flip-flops or gate insulators rather than continuously with analog integrators.
Very cool work in any event, though! Best of luck with the ongoing R&D.
