Teaching Practice of Analog Electronic Technology Theory Course Based on Multisim

In view of the problems existing in the teaching of analog electronic technology theory course, the simulation software Multisim is applied in the teaching of theory course. The application of Multisim in the teaching of RC sine wave oscillating circuit is taken as an example. And Multisim simulation shows a positive effect on improving the teaching quality of analog electronic technology theory course. Introduction Analog electronic technology course is a compulsory basic course for the students majored in automation, electrical engineering, communication engineering, electronic information and other electrical specialties in colleges and universities. It is the foundation of the students' follow-up professional courses and occupies a very important position in the whole curriculum system. Analog electronics is a subject researching analog signals' processing and computing. It uses semiconductor diode, transistor and field effect tube as the core electronic devices. The contents include voltage amplification circuit, power amplifier circuit, operation amplifier circuit, feedback amplifier circuit, signal operation and processing circuit, signal generating circuit, DC regulated power supply and so on. Analog electronic technology is a theoretical and practical course. It is also a course that is generally considered not easy to learn and hard to teach. In the traditional teaching mode of analog electronic technology, the tendency of emphasizing theory and despising practice is widespread. In addition, the contradiction of less time and more contents in the course makes the teaching effect not good. Some students do not understand, do not love learning, and can not use the knowledge to design the circuit. In order to solve this problem, we must improve and innovate the traditional teaching mode of theory courses. In recent years, with the rapid development of electronic computer technology, all kinds of circuit simulation software are coming out continuously, which provides new means and methods for the teaching activities of college teachers. In order to motivate the students' interest in learning and improve the teaching quality and teaching effect, we combine the classroom theory teaching with the Multisim simulation and make the boring circuit run, so that the students can easily accept and understand the theoretical knowledge. In this paper, the application and practice of simulation software in the teaching of analog electronic technology theory course are introduced by a specific teaching case, that is the application of Multisim in the teaching of RC sine wave oscillating circuit. Teaching of RC Sine Wave Oscillating Circuit Based on Multisim Sine wave oscillating circuit is widely used in scientific research, industrial production, medicine, communication and other fields. Oscillating circuit is a closed loop system that realizes positive feedback in the middle frequency band, without input signal and comparison. Its block diagram is shown in Figure 1. In order to maintain stable output, there is d f X X  . Because of f d X AF X  , the equilibrium condition of the oscillating circuit is written as