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Constraint-Programmed Initial Sizing of Analog Operational Amplifiers

机译:约束编程的模拟运算放大器的初始尺寸

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This paper presents a new method to automate the initial sizing of operational amplifiers. The method emulates the manual design procedure. The sizing task is formulated as a constraint programming problem. Two new algorithms are introduced: First, a hierarchical structural analysis of functional blocks that automatically sets up the analytical equations for the sizing. And second, a heuristic to guide branching process of a constraint programming solver. We achieve a reproduction of the manual proceeding of designers and at the same time an automation of the set-up of the design problem, reducing the set-up effort from months to seconds. 16 topologies, including different variants of two-stage, folded-cascode, telescopic and symmetrical op-amps, are considered at this time. In this paper, experimental results for a two-stage op-amp and a folded-cascode op-amp are presented to show the effectiveness of the approach.
机译:本文提出了一种自动计算运算放大器的初始尺寸的新方法。该方法模拟手动设计过程。大小确定任务被公式化为约束编程问题。引入了两种新算法:首先,对功能块进行分层结构分析,该结构会自动设置大小的分析方程式。其次,启发式指导约束编程求解器的分支过程。我们实现了设计师手动过程的复制,同时实现了设计问题的自动设置,从而将设置工作从几个月缩短到了几秒钟。目前考虑了16种拓扑,包括两级,折叠共源共栅,伸缩和对称运算放大器的不同变体。在本文中,提出了两级运算放大器和折叠共源共栅运算放大器的实验结果,以证明该方法的有效性。

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