But PLLs design process involves much theory and application base, such as signal and system, integrated electronics, layout, semiconductor technology, measurement etc.

但是锁相环的设计过程，涉及到信号与系统、集成电子学、版图、半导体工艺和测试等方面，难度比较大。

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Power Electronics is a course with high theory and practice character. Soft-switching inverter is an integrated course design teaching platform designed for this course.

“电力电子技术”是一门理论性与实践性均较强的课程，软开关逆变电源实验装置是为该课程设计的综合课程设计教学平台。

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Subtopics include: electronics engineering. laser and optical engineering. telecommunications engineering as well as integrated circuit design. among others.

主要课程包括：电子工程、激光、光学工程、电信工程和集成电路设计等。

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