Analog-input analog-weight dot-product operation with Ag/a-Si/Pt memristive devices

摘要

We demonstrate that hybrid circuit consisting of Ag/a-Si/Pt memristive devices and silicon operational amplifier can perform analog dot-product computation. The high conductive states in the considered memristive device are linear, making it useful for general analog-input analog-weight operations. In particular, in proposed hybrid circuits, input analog voltage is multiplied by analog weight (conductance) of memristive devices, and the resulting currents are passively summed with the inverting configuration operational amplifier. The proposed concept is checked experimentally by demonstrating passive mixing of two continuous analog signals using a discrete chip operational amplifier and Ag/a-Si/Pt memristive devices, which are programmed using a recently demonstrated variation-tolerant algorithm with a high precision.