A gas sensing neural circuit for an olfactory neuron  

作　　者：Xi-Kui Hu Song Zhu Juan Yang Zhao Yao Ping Zhou Jun Ma 

机构地区：[1]School of Science,Chongqing University of Posts and Telecommunications,Chongqing 400065,China [2]School of Physics and Electronics,Central South University,Changsha 410083,China [3]Department of Physics,Lanzhou University of Technology,Lanzhou 730050,China

出　　处：《Communications in Theoretical Physics》2024年第10期24-38,共15页理论物理通讯（英文版）

基　　金：supported by the Natural Science Foundation of Chongqing (Grant No. CSTB2024NSCQ-MSX0944)。

摘　　要：A gas sensor can convert external gas concentration or species into electric voltage or current signals by physical adsorption or chemical changes. As a result, a gas sensor in a nonlinear circuit can be used as a sensitive sensor for detecting external gas signals from the olfactory system. In this paper, a gas sensor and a field-effect transistor are incorporated into a simple FithzHugh–Nagumo neural circuit for capturing and encoding external gas signals. An improved functional neural circuit is obtained, and the effect of gas concentration, gas species and neuronal activity can be discerned as the gate voltage, threshold voltage and activation coefficient of the field-effect transistor, respectively. The gas concentration can affect the neural activities from quiescent to normal working and, finally, to saturation state in bursting, spiking, periodic and chaotic firings with different frequencies. The effects of gas species and neuronal activity on the firing state can also be achieved in this functional neural circuit. In addition, variations in the gate voltage, threshold voltage and activation coefficient can cause switching between different firing modes. These results can be helpful in designing artificial olfactory devices for bionic gas recognition and other coupled systems arising in applied sciences.

关 键 词：olfactory neural circuit BIFURCATION gas sensor field-effect transistor 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]