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p-n结注入电流脉冲结束后,结的暂态电压因放电而衰减,一般正常的衰减曲线是电压随时间几乎是线性减小,但有些p-n结的衰减曲线却与正常情况下的不同,出现驼峰状。这一现象自1955年被发现以来,许多学者纷纷对这一异常现象提出解释,但直到最近,王乔民利用p-n结势垒间接复合的观点,对驼峰现象进行了分析研究,才得出一个与实验定性吻合的超越微分方程:从而使问题得以初步解决,但王乔民在文章(科学通报,1987,1:14～18)中只定性分析了微分方程的可靠性,而未给出方程的解。作者用实验对p-n结放电驼峰曲线进行了测量,然后以实验为依据,逐步讨论放电方程的解。并用BASIC语言求出超越方程的数值解。逐次选用拟合参数,使近似方程的理论曲线与实验曲线大体一致。
pn junction into the current pulse after the end of the transient voltage decay due to discharge, the normal attenuation curve is almost linear voltage decreases over time, but some pn junction attenuation curve is different from the normal case, there hump shape. Since this phenomenon was discovered in 1955, many scholars have explained this anomaly one by one, but until recently, Wang Qiao-min used the indirect recombination of pn junction barriers to analyze and analyze the hump phenomenon and came to an experiment Qualitative anastomatous transcendental differential equation: so that the problem can be initially solved, but Wang Qiaomin in the article (Science Bulletin, 1987,1: 14 ~ 18) qualitatively analyzed only the reliability of the differential equation without giving the solution of the equation. The authors experimentally measured the hump-curve of the p-n junction discharge and then proceeded to discuss the solution of the discharge equation step by step on the basis of experiments. And use BASIC language to find the numerical solution beyond the equation. Successive selection of fitting parameters, the approximate equation of the theoretical curve and the experimental curve are generally consistent.