Of EDA technology in electric and electronic teaching

Abstract: Multisim2001 as a large number of simulation software, its application in electrical and electronic teaching in the form of teaching is undoubtedly a good reform. The software powerful application in teaching is also more convenient, and intuitively The simulation results will be displayed on the learners.

Keywords:: EDA Technology, electrical and electronic teaching

0 Introduction
With the development of computer Technology in electronic circuit design is playing an increasingly bigger role, a lot of good electronic design automation (EDA software have emerged, such as PSPICE, EWB, etc.. EDA Electronic Design Automation is the abbreviation of the English that the electronic design automation. in EDA software applications, to whom the application of EWB software most widely used. It consists of Canada, IIT (Interactive Image Technologies has introduced, and later launched an upgraded version of the software Multisim2001, it can simulate realistic various components and instrumentation, and circuit analysis using computer platform, analog circuits, digital circuits simulation program [1].

teaching the past mainly focused Formula and Theorem, relatively simple form of classroom teaching, teaching effectiveness in general. If the daily use of appropriate teaching simulation software, the results can be more intuitive to show up, and teaching methods more flexible, and can improve student learning initiative. In addition, the proper use of simulation software, can train students to use analysis software to solve problems, establish the correct concept of the design and analysis.

1 Multisim2001 in electrical and electronic teaching
1.1 Multisim2001 teaching modules in the circuit analysis of when the circuit contains only independent source, relatively easy to build circuit simulation, the simulation results and the most difficult to correct the error. If in the circuit with controlled sources, build the circuit correctly and will directly affect whether the results of the analysis. contains a voltage-controlled voltage source, the voltage requirements of the circuit obtained U.

First constructed by Multisim2001 simulation circuit, and then set the parameters of each component, that is, first, respectively, libraries and library from the power required to power select (including controlled sources and load resistance. Note that there are four side is controlled with an external source components connected to the control side at both ends should be parallel with resistor R2, controlled the negative side connected with the resistor R2, is an extreme ground, it is best to build an independent source and resistor circuit connection part, and then access controlled source. Second , double-click the component symbols, in the Properties dialog box, set its parameters. Finally, open the simulation switch simulation, observe the results. the observation that the voltage across the resistor R2 is 16V. reposted elsewhere in the Research Papers Download http://www . hi138.com 1.2 Multisim2001 teaching modules in the analog circuit applications in both common-emitter amplifier voltage gain, current gain there is a widely used amplifier, commonly used for a variety of amplifier circuit in the main amplification pole. Typical partial pressure amplification circuit, which resistor R3, R4 and R2 voltage divider formed, then there is resistance on the emitter R5, R6, thereby to stabilize the quiescent point. When the input amplifier plus a small ac signal Ui , the output side with whom they can enter a phase contrast and increasing the output signal amplitude Uo, to achieve amplification. quiescent operating point of amplifier set is reasonable, will directly affect the dynamic performance amplifier circuit. Thus the basic common emitter amplifier circuit, only to set the appropriate static operating point, the AC signal DC component contained in the above pack in order to ensure that the transistors in the input signal period always work in the enlarged state, the output voltage waveform will not produce distortion.

1.3 Multisim2001 teaching modules in the digital circuit application of the Schmitt trigger can change the main purpose is to slow the steep edge of the signal waveform is transformed into a rectangular wave. Schmitt trigger has two characteristics: first, the circuit has two kinds of stable state. two stable states, plus the conversion trigger signal needs to maintain two stable states also depend on the external trigger signal. Schmitt trigger circuit is level-triggered. Second, the circuit has two conversion levels. input signal from the low output level to rise to the circuit level conversion occurs, and the input signal from the high output level down to circuit level conversion occurs in different [2]. with 555 timers Schmidt Simulation of the trigger circuit [3]. One side of the capacitors 10nF CON played the role of filtering can be used to improve the reliability of the comparator reference voltage. THR and the TR-side together, as a Schmitt trigger input end.

2 Inspiration
Electrical and Electronic course will cover a broader scope, in the process of teaching appropriate introduction of simulation Technology, can be more intuitive results of the analysis show up, the effect is better than traditional teaching methods. With the simulation Technology in teaching and the gradual introduction of bound in the electrical, electronics and related fields to play a greater role.

References:
[1] Lin Yu. Multisim2001 in the "Electrical and Circuit Analysis" Teaching. Gansu Science and Technology, 2005.

[2] Qiu send fan. Digital electronic technology. Beijing: People's Posts and Telecommunications Press, 2005.

[3] Xiong, Hou missionary, Liang Qing, et al. Multisim7 circuit design and simulation. Beijing: Tsinghua University Press, 2005. Links http://www.hi138.com Research Papers Download