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采用三维数值模拟的方法对比研究了单个NMOS晶体管和反相器链中的单粒子瞬变(single event transient,SET)电流脉冲,发现深亚微米工艺下双极放大电流在单管的SET电流脉冲中占主要成分,而在反相器链的SET模拟中不明显,分析二者的区别解释了源/体结偏压的形成过程和放大机理,并证明了双极放大效应受源/体结偏压影响的结论.在此基础上分析了NMOS管中源极的正向电流及其机理,发现台阶区的源极正向电流主要是由扩散作用形成的.
关键词:
单粒子瞬变
双极放大
混合模拟
台阶区电流 相似文献
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Bound and Resonant States of the Hulthén Potential Investigated by Using the Complex Scaling Method with the Oscillator Basis
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Bound and resonant states of the Hulthén potential are studied. The complex scaling method is used to achieve the energy spectrum. The oscillator basis is used to expand the radial wave function. Conforming to the standard feature of the complex scaling method, the bound energies do not change and the continuums change with the rotational angle. With tables and graphs, the interesting properties of the energy spectrum for various physical parameters are presented. The Gauss quadrature integral approximation is used to deal with the potential integral term. 相似文献
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Using three-dimensional technology computer-aided design (TCAD) simulation, parasitic bipolar amplification in single event transient (SET) current of single transistor and its temperature dependence are studied. We quantify the contributions of different current components in SET current pulse, and it is found that the proportion of parasitic bipolar amplification in total collected charge is about 30% in both 130-nm and 90-nm technologies. The temperature dependence of parasitic bipolar amplification and the mechanism of SET pulse are also investigated and quantified. The results show that the proportion of charge induced by parasitic bipolar increases with rising temperature, which illustrates that the parasitic bipolar amplification plays an important role in the charge collection of single transistor. 相似文献
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以色氨酸为起始原料,Pictet-Spengler环化反应为关键步骤,制得系列环化产物酸,再与甲醇反应合成了8种新型的四氢-β-咔啉类衍生物(2a~2h),其结构经1H NMR和13C NMR表征。并研究了目标化合物对植物性病原真菌的抑菌活性。结果表明:2a~2h对9种植物病原真菌表现出广谱的抑菌活性,其中化合物2e和2f在50 mg·L-1浓度下对苹果轮纹病菌的抑菌率分别为93.12%和92.09%,其活性与参照药嘧菌酯相当,化合物2e~2h在50 mg·L-1浓度下对黄瓜灰霉病菌的抑菌率分别为89.21%、 86.14%、 79.94%和86.14%, 活性与参照药嘧菌酯相当。 相似文献
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中专物理恒定电流的教学中 ,学生对连接较为复杂的混联电阻求解感到困难 .本人从节点电势分析入手 ,讲授电路的等效变换 ,收到了较好的教学效果 .现介绍如下 .1 深刻理解电势的概念等效电路的变换 ,就是要求按照串、并联电路的性质和定义 ,将连接方式混杂的电阻等效地简化成一目了然的连接关系 .根据电场的性质和电流方向的规定 :在电源外电路中 ,电流总是由高电势流向低电势 .要确定电路中电流的流向 ,必须判定出电路中各点的电势高低 ,特别是节点电势的高低 .在一个实际电路中 ,如果有两节点 (或更多节点 )电势相同 ,用导线将它们连接起… 相似文献