Efficient evaluation model including interconnect resistance effect for large scale RRAM crossbar array matrix computing

Crossbar architecture has been considered as an efficient means to execute a matrix-vector multiplication computation. An efficient evaluation model for this computation including the interconnect resistance effect on the high density resistive random access memmory (RRAM) crossbar array is proposed in this paper. The proposed model considers the interconnect resistance impacts on the columns and rows separately. The simulation results indicate that the computing speed of the proposed model can be boosted by over three orders of magnitude with the computation deviation of 7.7% in comparison with the precise comprehensive model in the 64 kb crossbar array fabricated at the 14 nm technology node. Based on the proposed evaluation model, the impacts of the parameters including nonlinearity and load resistance, on the computation are discussed along with solutions to improve the computational performance.