The core of EDA technology is to use computers to automate circuit design, so EDA software occupies an extremely important position in EDA technology. There are many kinds of EDA software. Among them, Multsim has a strong simulation function on the circuit and is more suitable for theoretical teaching. Therefore, when integrating, we choose Multsim software and electronic technology courses for integration. It has a good interface and a rich component library, which can simulate the working state of various analog, digital and high-frequency circuits, which is convenient for students to understand the working principle of the circuit; it also has a variety of virtual instruments and a variety of analysis functions, capable of Virtual experiment and simulation measurement of circuit. Strengthen basic concepts, basic principles, basic circuits and basic analysis methods through circuit simulation to help students master the basic composition, application and common measurement methods of circuits.
The principle of abstraction is embodied in the analog electronic technology. The principle of each unit circuit is very abstract. For example, the principle of the common basic amplifier circuit. In traditional teaching, we can only explain it through language description, performance estimation and auxiliary drawing. The principle of magnification, students often get impatient without hearing half. Now we can move the circuit and the oscilloscope to the classroom through the EDA software, so that the original abstract principle can be seen at a glance. The input and output waveforms of the common emission amplifier circuit are as shown.
The input and output waveforms of the common-emitter amplifying circuit through the simulation of the circuit, students establish a perceptual understanding of the phenomenon of signal amplification. By observing the simulated waveform, students can obtain the specific magnification of the circuit by measuring the reading, and find that the signal has nonlinear distortion through measurement, and can also visually see the phase relationship between the input and output signals, making the original abstract principle Become concrete.
Simplify the design of digital circuits. The focus of digital circuit teaching is not to explain and analyze circuit principles, but to focus on functional applications. Therefore, the classroom teaching is based on the function of the students' application circuit, which requires students to design and analyze the circuit. When designing courses, students usually make traditional designs on scratch paper, which takes time and labor, and the results may not be correct. After integration with EDA technology, it can make the design of digital circuits simpler and more effective. Multsim software provides many automatic design functions for digital circuits, such as logic converters, which can automatically find truth tables based on logic function expressions, and automatically convert logic circuit diagrams, as shown. Using Multsim software for digital circuit function design, the instrument can be used for test verification and automatic generation of some functions, and components can be deleted and replaced at will during the design process, so it is very convenient. Then conduct logic and performance analysis and timing test. After the test is passed, you can use Multsim software to automatically generate a PCB board diagram, then make a PCB board, and assemble the circuit directly on the PCB board. This method of circuit design using simulation software is simple and easy to implement. Because the circuit function is tested and simulated in advance, the loss of components caused by functional errors in the design is avoided.
Conclusion The effective integration of electronic design automation software and electronic technology has enabled students to be proficient in using EDA technology to effectively learn the knowledge of electronic technology, and has achieved obvious teaching results. Through the use of EDA technology, the teaching becomes vivid and greatly enhances students' interest in learning. With the powerful functions of EDA technology, the learning of electronic technology becomes easier.
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