共查询到20条相似文献,搜索用时 125 毫秒
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运用漂移-扩散模型,对表面型静电感应晶闸管的导通特性进行了数值模拟。分析表明,表面型静电感应晶闸管(SITH)具有与纵向结构SITH类似的负阻导通特性,而且表面型结构的各电极相对面积比纵向结构要小很多,阴极和栅极之间的电容更小,从而具有更快的开关速度和更高的灵敏度。对表面型SITH的电势分布、载流子分布以及阳极I-V特性进行了深入地计算和分析。显示数值模拟结果十分接近实际测量结果,模拟中也发现栅极的位置对栅极的控制性能的影响很大。 相似文献
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The physical effects of the carrier distribution in the channel on the dynamical performance of a static induction thyristor (SITH) have been studied numerically and experimentally. The analytical expressions of the minority carrier distribution in the channel of the SITH were also derived and the space charge distribution control- ling mechanism on the current of the SITH under high level injection have been analyzed deeply. The relationships among the minority carrier distribution, potential distribution, I-V characteristics and transient performances of the SITH are revealed. 相似文献
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本文扼要地介绍了新型电力半导体器件SIT和SITH的研制、生产和应用的发展情况.说明SIT和SITH已从试制阶段进入实用化阶段. 相似文献
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从应用角度出发,测量分析了国产静电感应晶闸管(SITH)的主要电参数,特别是在开启、关断特性上作了详细的研究.针对应用较多的领域,研究出了四种各具特色、适用不同场合的驱动电路.测试表明这些电路可以使SITH器件达到较好的应用水平. 相似文献
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文章提出了用硅-硅直接键合(SDB)工艺替代静电感应晶闸管(SITH)中的二次外延,有效地提高了栅阴极击穿电压,增强了通过栅极正向阻断阳极电压的能力。对键合过程中硅-硅界面进行了研究,提出了提高界面质量的工艺措施;同时,给出了控制栅阴极击穿电压一致性的方法。对采用此方法制成的SITH的I-V特性进行了测量,并给出了实际测试结果。 相似文献
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凝视型红外热像仿真技术研究 总被引:1,自引:0,他引:1
本文从为红外预警或制导系统开发提供实用的红外图像仿真技术出发,建立了完整的凝视型红外热像仿真模型。为建立该模型,本文分别对目标和背景的辐射仿真、大气系统的仿真、光学系统的仿真、凝视型探测器的仿真四个部分的机理进行了深入研究,并为各个部分建立了完备的数学模型.最后通过一幅坦克与夜天光相结合的仿真图像验证了该模型的效果,该仿真图像尤其考虑了非均匀性和衍射效应以获得好的效果。 相似文献
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文章介绍了以太网中提供电路仿真业务的应用参考模型,接着阐述了该业务的主要技术要求,最后提出了几种典型的电路仿真业务在以太网中的实现方案。 相似文献
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The design and development of a complex system requires an adequate methodology and efficient instrumental support in order to early detect and correct anomalies in the functional and non-functional properties of the tested protocols. Among the various tools used to provide experimental support for such developments, network emulation relies on real-time production of impairments on real traffic according to a communication model, either realistically or not. This paper aims at simply presenting to newcomers in network emulation (students, engineers, etc.) basic principles and practices illustrated with a few commonly used tools. The motivation behind is to fill a gap in terms of introductory and pragmatic papers in this domain. The study particularly considers centralized approaches, allowing cheap and easy implementation in the context of research labs or industrial developments. In addition, an architectural model for emulation systems is proposed, defining three complementary levels, namely hardware, impairment, and model levels. With the help of this architectural framework, various existing tools are situated and described. Various approaches for modeling the emulation actions are studied, such as impairment-based scenarios and virtual architectures, real-time discrete simulation, and trace-based systems. Those modeling approaches are described and compared in terms of services, and we study their ability to respond to various designer needs to assess when emulation is needed. 相似文献
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主要介绍了用Ansoft Designer设计的耦合型功率分配器,对用Ansoft Designer设计的电路进行了分析,并采用弧形修正方式补偿阶梯突变所产生的不连续,最后给出了其仿真结果。 相似文献