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本文用小信号理论计算了其负阻和噪声性能，并进行了大信号性能的近似分析。
The negative resistance and the noise performances are calculated by means of small signal theory. The large-signal performances are also approximately described.
依据自动控制理论中的小信号理论，小电流TIG焊的电弧具有线性系统的特征。
According to small signal theory of automation theory, arc of low current TIG welding can be considered as a linear system.
理论上基于载流子消耗机制，对激光器型波长转换器进行了小信号分析，给出了频率响应函数。
The small signal analysis of laser diode type all optical wavelength converter is presented using carrier depletion, and the frequency response function is given.
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