Fig. 2: Details of the hardware realization of the logarithmic Bayesian machine.

a Optical microscopy image of the die of the fabricated machine. b Detail of the likelihood block, which consists of digital circuitry and memory block with its periphery circuit. c Photograph of the 2T2R memristor array. d Scanning electron microscopy image of a memristor in the back end of the line of our hybrid memristor/CMOS process.