Von Neumann posthumously patented an analog computing architecture. I don't think it was ever built. https://patents.google.com/patent/US2815488A/en https://pat

Von Neumann posthumously patented an analog computing architecture. I don't think it was ever built. https://patents.google.com/patent/US2815488A/en https://patents.google.com/patent/US2815488A/en However, there is a lab at Berkeley working on the topic, with really interesting work being done: http://people.eecs.berkeley.edu/~tianshi/research.html http://people.eecs.berkeley.edu/~tianshi/research.html "logic is encoded using the phase of oscillatory signals, rather than voltage levels. Such phase encoding has long been used in radio communication for its superior noise immunity; we show that it can also be used for computation, using self-sustaining nonlinear oscillators as underlying logic elements." Harmonic injection computing, anyone?