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本文用高频小信号等效电路对MOCCⅡ电路进行了分析,提出了vx/vy的双二次模型理论。采用最小二乘法中的最速下降法根据MOCCⅡ的PSPICE仿真曲线对该模型进行最小二乘曲线拟合,得出双二次模型各参数。拟合后曲线与PSPICE仿真曲线在取样点误差的方均根值为10-7数量级;同时对iz/ix的单极点模型和iz-/ix的双极点模型均进行了最小二乘曲线拟合,得出了模型参数,拟合后曲线与PSPICE仿真曲线在取样点误差的方均根根值为10-5数量级。这些MOCCII(CCⅡ)高频模型在高频滤波器等电路的设计中具有重要的意义。
In this paper, high frequency small signal equivalent circuit MOCC Ⅱ circuit analysis, proposed vx / vy biquadratic model theory. According to the PSPICE simulation curve of MOCCⅡ, the least square curve fitting was performed by the steepest descent method in the least square method to get the parameters of biquadratic model. The root mean square error of the fitting curve and the PSPICE simulation curve at the sampling point is 10-7 orders of magnitude. At the same time, the least squares curve fitting is performed on both the single-pole model of iz / ix and the double-pole model of iz- / ix After the model parameters were obtained, the root mean square root of the error of the fitting curve and PSPICE simulation curve at the sampling point was 10-5 orders of magnitude. These MOCCII (CCⅡ) high-frequency models are of great importance in the design of circuits such as high-frequency filters.