AUTHOR=Wang Rui , Mu Zhicheng , Sun Hui , Wang Yuyue TITLE=Dual-Mode Memristor Synaptic Circuit Design and Application in Image Processing JOURNAL=Frontiers in Physics VOLUME=Volume 9 - 2021 YEAR=2021 URL=https://www.frontiersin.org/journals/physics/articles/10.3389/fphy.2021.690944 DOI=10.3389/fphy.2021.690944 ISSN=2296-424X ABSTRACT=Memristor is a kind of synaptic element with nanometer size and continuously variable memristance. The bridge synaptic circuit constructed by memristor has simple structure and precise control. In practice, because of the nonlinear characteristics of memristor, it will have a certain impact on the control of synaptic circuit and cause errors in weights. Therefore, a novel memristor synaptic circuit is proposed in this paper, the dual-mode memristor bridge synaptic neural network. The proposed method can make the weights more linear by controlling the input voltages, and make the outputs more linear by using symmetrical positive and negative pulses. Therefore, the proposed synaptic circuit is easier to be controlled. In this paper, the numerical simulations are conducted and verify the feasibility. Furthermore, the simulation experiments are conducted for edge extraction of grayscale birds images in the airport for bird recognition applied for the bird repelling applications.