【摘要】 针对模拟电路尺寸调整的自动化设计进行了研究,提出了一种基于正项式模型的模拟电路设计新方法,该方法将模拟电路设计问题构建为一个凸优化问题;具体来说,对于一个具有多个规格指标的模拟电路,首先从物理模型和电气模型两方面分别建立具有正多项式的工艺过程相关级模型和电路块级模型,然后扩展到更高层次的层次模型——系统级模型,从而完成电路的综合设计。以一个二级运算放大器和一个标准流水线模数变换器的设计实例表明,提出的方法相比于一般的设计方法不仅可以更精确地建模真实的电路行为,而且还可以在各种规格指标之间提供较好的权衡。更多还原

【Abstract】 In this paper,the automatic design of analog circuit sizing is studied and a new method for analog circuit design based on posynomial model is proposed.The design problem of analog circuit is formulated as a convex optimization problem.Specifically,for an analog circuit with multiple specifications,the process dependent level models and the circuit block level models with posynomials are established respectively from the physical model and the electrical model firstly,and then higher levels of hierarchy models-system level model is extended to complete the integrated design of the circuit.The design examples of a two-stage operational amplifier and a standard pipelined analog-to-digital converter show that the proposed method,compared with the general-purpose design methods,can not only model the real circuit behavior more accurately,but also provide better tradeoffs among various specifications.更多还原