A Design of Pulse Coded CMOS Neuron Circuit

According to the electrochemical characteristics of biological neurons,this paper presents a new compact pulse coded CMOS neuron circuit based on IF model to imitate a continuous pulse steam generated by neuron cell.We show that the model has been simplified greatly,it characterizes many aspects of real neurons.In the case that the fabrication parameters of transistors cannot be adjusted,the circuit construction and coupled weights can be controlled flexibly by the input signals,then the circuit realizes the pulse code modulation of the input signals.The results of HSPICE simulation show that this circuit can realize the weight identification of the binary square-wave input signal according to the frequency of output pulse stream.This new pulse coded CMOS neuron circuit would have great application prospects in the information transmission,the construction of image recognition neural network and signal modulation.