In this paper, the condition under which the surface excess minority carrier density may be treated as a constant is also analysed.
在文中，我们也分析了可以把表面非平衡少子浓度作常数处理的条件。
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This paper presents a pulse density modulated (PDM) series resonant inverter developed for plastic film surface treater. The use of the PDM inverter enables the constant frequency and voltage.