以有源法布里-珀罗谐振腔的增益特性为基础，研究了行波半导体光放大器的偏振特性。

The polarization characteristics of Travelling-wave semiconductor optical amplifier (TW-SOA) is investigated based on th gain property of active Fabry-Perot resonator.

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根据有源滤波的特点提出了采用铁硅铝作为铁心材料，利用最小体积法对电感进行了优化设计。

According to the characteristics of active filter, Fe-Si-Al is used and minimum volume method is adopted to optimize the design of inductance.

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以RC有源滤波电路为例，介绍了一种对含有运算放大器网络进行分析的新的约束网络法，并对其进行了较细致的研究。

A new restraining network method for analysing the network with operational amplifier is investigated in detail, taking RC active filter as a sample.

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