CREATION OF A VIRTUAL THERMORESISTOR MODEL IN THE LABVIEW PROGRAM FOR STUDYING THE CHARACTERISTICS OF SEMICONDUCTORS

Abstract

The article discusses the development of a virtual device for studying the temperature characteristics of semiconductor materials based on thermistors in the LabVIEW graphical programming environment. The relevance of the work is due to the spread of distance and blended learning, in which students’ access to real laboratory stands is limited. Existing software simulators of electronic circuits are mainly focused on the analysis of electrical circuits and have limited capabilities for studying the physical parameters of semiconductor materials. In this regard, there is a need to create specialized virtual laboratory tools that allow reproducing the logic of a real experiment and ensuring the full implementation of practical work in a remote format. The purpose of the work is to create an interactive software model that allows conducting a virtual experiment to study the temperature dependence of the thermistor resistance and determine the parameters of the semiconductor material. The research methodology is based on the use of tabular temperature characteristics of thermistors, which are given in the technical documentation of manufacturers. The data is integrated directly into the program in the form of internal arrays, which ensures the autonomy of the software tool. The developed virtual device implements the sequential stages of laboratory research: input of initial data, virtual measurements and processing of results. In the measurement mode, the user forms a set of experimental points, specifying the temperature values for which the thermistor resistance is calculated. Graphical display of dependencies, automatic data sorting and the ability to edit selected points are provided. In the data processing mode, linearization of the dependence and linear approximation by the least squares method are performed, which allows determining the activation energy of the charge transfer process in the thermistor material. The developed software tool can be used as part of virtual laboratory workshops in physics and electronics, providing the ability to perform research in a distance learning environment.