A dependable circuit simulation plays an elementary part in the process of commercial circuit design. However, when Alfred Fettweis invented the concept of Wave Digital Filters (WDFs) back in the early 1970s, that was clearly not the case as tools like SPICE hadn't been published yet. But even though Fettweis' new WDFs were able to provide an accurate digital model of analogue reference circuits, they were mostly perceived as an elaborated technique for digital filter design. In this article we provide an insight into Wave Digital Filters with a focus on nonlinear circuit simulation, highlighting assets and drawbacks of the method. In particular, recent results that extend the Wave Digital concept towards a general circuit simulation strategy with interesting properties are presented.

中文翻译：

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借助 Alfred Fettweis 的波数字原理进行非线性电路仿真

可靠的电路仿真在商业电路设计过程中起着重要作用。然而，当 Alfred Fettweis 在 1970 年代初期发明波数字滤波器 (WDF) 的概念时，情况显然并非如此，因为像 SPICE 这样的工具尚未发布。但是，尽管 Fettweis 的新 WDF 能够提供模拟参考电路的准确数字模型，但它们大多被视为数字滤波器设计的精细技术。在本文中，我们深入介绍了波形数字滤波器，重点是非线性电路仿真，重点介绍了该方法的优点和缺点。特别是，最近的结果将波数字概念扩展到具有有趣特性的一般电路仿真策略。