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Summarized EWB 5. 0C in the analysis and design of electronic circuits and related professional courses in teaching and the teaching methods used in experiments, methods have undergone significant changes. Introduced EWB 5. 0C basic meaning, characteristics and the basic principles of encoder circuits, and pointed EWB 5. 0C powerful functional simulation design and application of simulation studies in the main encoder progress. Through EWB discussed several encoder emulation of the graphics in the process and the types of mechanisms and methods described in the case, and help to enhance analytical capabilities of students and to fully mobilize the enthusiasm of students, to enhance the learning enthusiasm. Introduced EWB 5. 0C simulation software certification applications for teaching courses in a certain type of electronic reference value.