Programmable electronic load for analog electronic technique teaching

Abstract

The invention provides a programmable electronic load for analog electronic technique teaching. The programmable electronic load comprises a voltage-controlled current source unit, an A / D conversion unit, a D / A conversion unit, an MCU control unit, a keyboard unit and a display unit, wherein the voltage-controlled current source unit is composed of a high power field-effect tube Q1, a current sampling resistor R1 and an operational amplifier U1. According to the invention, a voltage-controlled current source is used as an electronic load, the output voltage of the D / A conversion unit is controlled by the MCU control unit, and then the output voltage of the D / A conversion unit controls the output current of the voltage-controlled current source, and the voltage-controlled current source is used as the electronic load. Thus, the programmable electronic load can flexibly simulate the loads in different resistance values according to the setting; and when the programmable electronic load is applied to the practical teaching of an analog electronic technique curriculum, series of high power resistors in different resistance values are not required as loads, so that the practical teaching cost is saved, and the workload of a practical training guiding teacher is relieved.

Description

technical field [0001] The invention relates to a program-controlled electronic load, in particular to a program-controlled electronic load used for teaching analog electronic technology, and belongs to the field of electronic technology. Background technique [0002] In the training teaching of analog electronic technology courses, in order to facilitate students to test the relevant indicators of the training circuit, it is usually necessary to provide each group of students with a series of high-power resistors with different resistance values ​​as loads, which not only increases the cost of training and teaching, but also increases Reduced the workload of the training instructors. Since the program-controlled electronic load can simulate various loads with different resistance values ​​according to the setting, we hope to design a program-controlled electronic load for use in the training and teaching of analog electronic technology courses. The design idea of ​​this pr...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a program-controlled electronic load for analog electronic technology teaching to solve the problem of large workload and high cost caused by the need to equip a series of high-power resistors with different resistance values ​​as loads in the current analog electronic technology course training teaching

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