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双极型晶体管交流模型参数的优化提取包括势垒电容模型参数和正向渡越时间模型参数的优化提取.采用非线性函数最小二乘法拟合实验曲线对上述参数的提取是非常有效的.电容模型公式是由耗尽层近似理论推得的.用该电容模型公式拟合实验曲线,得到了最优的电容模型参数,计算曲线与实验曲线的误差约为1％.为了精确模拟正向渡越时间,根据实验结果对 SPICE 2G程序中的模型公式进行了修正,用修正后的模型公式拟合实验曲线,得到了最优的描述正向渡越时间的模型参数,计算曲线与实验曲线的误差为1.02％.
Bipolar transistor AC model parameters optimization extraction includes the barrier capacitance model parameters and the forward transit time model parameters optimization extraction using nonlinear function least square fitting experimental curve for the extraction of these parameters is very effective.Capacitance model The formula is deduced from the depletion layer approximation theory. The experimental model is fitted with the capacitance model formula, and the optimal capacitance model parameters are obtained. The error between the calculated curve and the experimental curve is about 1%. In order to accurately simulate the positive transition Time, the model formula in SPICE 2G program was modified according to the experimental results, the experimental curve was fitted with the modified model formula, the optimal model parameters describing the forward transit time were obtained, the error between the curve and the experimental curve was calculated Is 1.02%.