This article proposes an efficient method for the calculation of the stabilization parameters in RF power amplifiers operating in periodic large-signal regimes. Stabilization is achieved by applying the principles of linear control theory for periodic linear time-varying (PLTV) systems. A numerical method is proposed to obtain the harmonic transfer function that represents the system linearized around the large-signal steady state. Then, a feedback analysis is performed to calculate the closed-loop poles of the PLTV system. The proposed approach is demonstrated with two examples. First, a three-stage amplifier that exhibits a low-frequency oscillation for increasing values of input power is correctly stabilized. Next, the stabilization of an unstable design that exhibits an odd-mode parametric oscillation is presented. The results of the proposed technique are compared to those obtained with the conventional parametric stability simulation. These examples serve to illustrate the capability and efficiency of the proposed approach.

中文翻译：

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射频功率放大器中稳定参数的有效计算

本文提出了一种计算在周期性大信号状态下工作的射频功率放大器的稳定参数的有效方法。通过将线性控制理论的原理应用于周期性线性时变 (PLTV) 系统，可以实现稳定。提出了一种数值方法来获得表示系统在大信号稳态附近线性化的谐波传递函数。然后，执行反馈分析以计算 PLTV 系统的闭环极点。所提出的方法通过两个例子进行了演示。首先，对增加输入功率值表现出低频振荡的三级放大器进行正确稳定。接下来，介绍了表现出奇模参数振荡的不稳定设计的稳定性。将所提出的技术的结果与通过传统参数稳定性模拟获得的结果进行比较。这些示例用于说明所提出方法的能力和效率。