Towards smaller single-point failure-resilient analog circuits by use of a genetic algorithm

Failure-resilient analog circuits are difficult to design, but artificial intelligence can help crawl the topology solution space. Us-ing evolutionary computation-based topology synthesis we evolve analog arcus tangent computational circuits, resilient to any rectifying diode or resistor high-impedance single failure or removal. We encode analog circuit topologies as individuals with an upper-triangular incident matrix. Circuits are evolved using a combined technique utilizing parts of NSGA-II and PSADE, based on a special three-dimensional robustness function. We show that topology size for a failure-resilient circuit can be classes smaller than hand-made component-redundancy-based solutions. Our best failure-resilient topology comprises six diodes, three resistors, and a voltage offset source.